Garlic-Herb Roasted Mixed Vegetables with Broccoli, Cauliflower, Carrots & Peppers
Garlic-Herb Roasted Mixed Vegetables with Broccoli, Cauliflower, Carrots & Peppers is a colourful, flavour-packed side dish featuring tender roasted broccoli, cauliflower, sweet carrots, bell peppers, and red onion. Everything is coated in a fragrant garlic-herb seasoning and roasted until beautifully caramelized around the edges.
A finishing touch of fresh lemon juice, parsley, thyme, and optional Parmesan adds brightness and savoury flavour. It’s an easy way to turn everyday vegetables into a delicious side that works with almost any meal.
Ingredients
For the Roasted Vegetables
- 2 cups (180 g) broccoli florets
- 2 cups (200 g) cauliflower florets
- 2 large carrots (about 200 g), peeled and sliced
- 1 red bell pepper, cut into bite-sized pieces
- 1 yellow bell pepper, cut into bite-sized pieces
- 1 small red onion, cut into wedges
- 3 tbsp olive oil
- 4 garlic cloves, minced
- 1 tsp dried oregano
- 1 tsp dried thyme
- 1/2 tsp smoked paprika
- 1/2 tsp onion powder
- 1/2 tsp salt
- 1/4 tsp black pepper
For the Lemon Herb Finish
- 1 tbsp fresh lemon juice
- 1 tbsp fresh parsley, chopped
- 1 tsp fresh thyme leaves
- 1 tsp lemon zest
- 1 tbsp grated Parmesan cheese, optional
How to Make It
1. Preheat the Oven
Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper for easier cleanup.
2. Prepare the Vegetables
Add the broccoli, cauliflower, carrots, red bell pepper, yellow bell pepper, and red onion to a large mixing bowl. Cut the vegetables into relatively similar-sized pieces so they roast evenly.
3. Make the Garlic-Herb Seasoning
In a small bowl, whisk together the olive oil, minced garlic, dried oregano, dried thyme, smoked paprika, onion powder, salt, and black pepper until well combined.
4. Season the Vegetables
Pour the garlic-herb mixture over the vegetables. Toss thoroughly until every piece is lightly coated with the seasoned oil.
5. Arrange on the Baking Sheet
Spread the vegetables across the prepared baking sheet in a single layer. Leave a little space between the pieces whenever possible. Avoid overcrowding the pan, as this helps the vegetables roast and caramelize instead of steaming.
6. Roast
Roast for 30–40 minutes, stirring or turning the vegetables halfway through cooking. Continue roasting until the vegetables are tender and the edges are golden brown with lightly crisp, caramelized spots.
7. Add the Lemon Finish
Remove the vegetables from the oven and immediately drizzle them with fresh lemon juice. Toss gently to distribute the bright citrus flavour throughout the roasted vegetables.
8. Garnish
Sprinkle the vegetables with fresh parsley, thyme leaves, and lemon zest. Add grated Parmesan if desired for an extra savoury finish.
9. Serve
Serve warm as a colourful side dish alongside roasted chicken, grilled fish, steak, pasta, rice, or your favourite grain-based meal.
Why This Recipe Works
This recipe transforms simple vegetables into a deeply flavourful side dish through high-heat roasting. The broccoli and cauliflower develop golden edges, while the carrots and bell peppers become naturally sweet and tender.
The garlic, oregano, thyme, smoked paprika, and onion powder create a savoury seasoning blend that coats every vegetable. Fresh lemon juice added after roasting cuts through the richness and keeps the dish tasting bright and fresh.
Finally, fresh herbs and optional Parmesan provide a finishing layer of flavour that makes these roasted vegetables special enough for both everyday dinners and holiday meals.
Tips for the Best Roasted Vegetables
- Don’t overcrowd the pan: Spread the vegetables out so hot air can circulate and the edges can caramelize.
- Cut evenly: Similar-sized pieces will cook at a more consistent rate.
- Use high heat: Roasting at 425°F (220°C) encourages browning and caramelization.
- Turn halfway through: This helps the vegetables brown more evenly on multiple sides.
- Add lemon at the end: Fresh lemon juice provides a brighter flavour when added after roasting.
- Don’t skip the fresh herbs: Parsley and thyme add freshness that balances the roasted garlic and spices.
- Try Parmesan: A small amount of freshly grated Parmesan adds a delicious savoury finish.
Serving Suggestions
These roasted vegetables are versatile enough to accompany almost any main course. Serve them with roasted chicken, grilled steak, baked salmon, or pan-seared fish for an easy dinner.
For a vegetarian meal, spoon the vegetables over cooked quinoa, couscous, rice, or farro. You can also add chickpeas, crumbled feta, or a simple yogurt sauce to turn them into a satisfying bowl.
They also make a colourful addition to a holiday or family dinner table, especially when served directly from a large platter.
Frequently Asked Questions
Can I use frozen vegetables?
Yes, although fresh vegetables generally roast and caramelize better. If using frozen vegetables, roast them directly from frozen and avoid overcrowding the baking sheet so excess moisture can evaporate.
Can I add other vegetables?
Absolutely. Zucchini, mushrooms, Brussels sprouts, sweet potatoes, asparagus, or cherry tomatoes can all work well. Adjust the cutting size and cooking time depending on the vegetable.
How do I make the vegetables extra crispy?
Make sure the vegetables are relatively dry, don’t overcrowd the baking sheet, and roast them at high heat. A preheated baking sheet can also help create more browning on the underside.
Can I prepare these vegetables ahead of time?
Yes. You can wash and cut the vegetables and prepare the seasoning several hours ahead. For the best texture, roast them shortly before serving.
How should I store leftovers?
Store leftover roasted vegetables in an airtight container in the refrigerator for up to a few days. Reheat them in a hot oven or air fryer to help restore some of their roasted texture.
Can I make this recipe dairy-free?
Yes. Simply leave out the optional Parmesan cheese. The roasted vegetables are still full of flavour from the garlic, herbs, spices, and lemon.
Nutrition & Timing
| Details | Amount |
|---|---|
| Prep Time | 15 minutes |
| Cook Time | 35 minutes |
| Total Time | 50 minutes |
| Servings | 6 |
| Calories | Approx. 190 per serving |
| Protein | Approx. 6g per serving |
Final Thoughts
Garlic-Herb Roasted Mixed Vegetables with Broccoli, Cauliflower, Carrots & Peppers is an easy, colourful side dish that delivers plenty of flavour with minimal effort. Roasting brings out the natural sweetness of the carrots and peppers while giving the broccoli and cauliflower beautifully caramelized edges.
With fragrant garlic and herbs, a bright squeeze of lemon, and optional Parmesan on top, these vegetables are simple enough for a weeknight dinner but impressive enough for a special gathering.
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Garlic-Herb Roasted Mixed Vegetables with Broccoli, Cauliflower, Carrots & Peppers
- Total Time: 50 minutes
Description
Colourful, flavour-packed roasted vegetables featuring broccoli, cauliflower, carrots, bell peppers, and red onion coated in fragrant garlic and herbs, then finished with fresh lemon, parsley, thyme, and optional Parmesan.
Ingredients
For the Roasted Vegetables
2 cups (180 g) broccoli florets
2 cups (200 g) cauliflower florets
2 large carrots (about 200 g), peeled and sliced
1 red bell pepper, cut into bite-sized pieces
1 yellow bell pepper, cut into bite-sized pieces
1 small red onion, cut into wedges
3 tbsp olive oil
4 garlic cloves, minced
1 tsp dried oregano
1 tsp dried thyme
1/2 tsp smoked paprika
1/2 tsp onion powder
1/2 tsp salt
1/4 tsp black pepper
For the Lemon Herb Finish
1 tbsp fresh lemon juice
1 tbsp fresh parsley, chopped
1 tsp fresh thyme leaves
1 tsp lemon zest
1 tbsp grated Parmesan cheese, optional
Instructions
1. Preheat the oven to 425°F (220°C). Line a large baking sheet with parchment paper.
2. Add the broccoli, cauliflower, carrots, red bell pepper, yellow bell pepper, and red onion to a large mixing bowl. Cut the vegetables into relatively similar-sized pieces so they roast evenly.
3. In a small bowl, whisk together the olive oil, minced garlic, dried oregano, dried thyme, smoked paprika, onion powder, salt, and black pepper until well combined.
4. Pour the garlic-herb mixture over the vegetables and toss thoroughly until every piece is lightly coated.
5. Spread the vegetables across the prepared baking sheet in a single layer, leaving a little space between the pieces whenever possible.
6. Roast for 30–40 minutes, stirring or turning the vegetables halfway through, until tender with golden-brown, lightly crisp, caramelized edges.
7. Remove the vegetables from the oven and immediately drizzle with fresh lemon juice. Toss gently to distribute the citrus flavour.
8. Sprinkle with fresh parsley, thyme leaves, and lemon zest. Add grated Parmesan if desired.
9. Serve warm as a colourful side dish alongside roasted chicken, grilled fish, steak, pasta, rice, quinoa, couscous, or your favourite grain-based meal.
Notes
Don’t overcrowd the baking sheet. Spread the vegetables out so hot air can circulate and the edges can caramelize. Cut the vegetables into similar-sized pieces so they cook at a consistent rate. Roasting at 425°F (220°C) encourages better browning and caramelization. Turn the vegetables halfway through cooking for more even browning. Add the lemon juice after roasting for the brightest flavour. Fresh parsley and thyme add freshness that balances the roasted garlic and spices. A small amount of freshly grated Parmesan adds an extra savoury finish. Fresh vegetables generally roast and caramelize better than frozen vegetables. If using frozen vegetables, roast them directly from frozen and avoid overcrowding the pan. Zucchini, mushrooms, Brussels sprouts, sweet potatoes, asparagus, or cherry tomatoes can be added. Adjust cutting size and cooking time as needed. For extra crispy vegetables, make sure they are relatively dry, avoid overcrowding, and use high heat. A preheated baking sheet can also improve browning. You can wash and cut the vegetables and prepare the seasoning several hours ahead. For the best texture, roast shortly before serving. Store leftovers in an airtight container in the refrigerator for up to a few days. Reheat in a hot oven or air fryer to restore some of the roasted texture. For a dairy-free version, simply omit the Parmesan. For a vegetarian meal, serve the vegetables over quinoa, couscous, rice, or farro with chickpeas, feta, or a simple yogurt sauce. These vegetables pair well with roasted chicken, grilled steak, baked salmon, pan-seared fish, or seasonal soups.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Side Dish
- Method: Roasting
- Cuisine: Mediterranean
