Savory Sweet Potato & Butternut Lasagna Stack with Feta, Spinach, Walnuts, Sage Brown Butter & Cranberries

Savory Sweet Potato & Butternut Lasagna Stack with Feta, Spinach, Walnuts, Sage Brown Butter & Cranberries is a beautiful vegetable-forward bake made with tender roasted sweet potato and butternut squash layered with creamy spinach, feta, and ricotta. The combination of savoury vegetables, fragrant sage brown butter, and warm spices creates a comforting dish with plenty of flavour in every layer.

Finished with crunchy walnuts, sweet-tart dried cranberries, Parmesan, and fresh sage, these individual-style lasagna stacks make an elegant centrepiece for a family meal, festive dinner, or special weekend lunch. The roasted vegetables become tender and lightly caramelised while the walnut and cranberry topping adds contrasting texture and colour.

Ingredients

For the Roasted Vegetables:

• 2 medium sweet potatoes, peeled and thinly sliced (450 g)
• 3 cups butternut squash, peeled and thinly sliced (420 g)
• 2 tbsp olive oil (30 ml)
• ½ tsp salt (3 g)
• ¼ tsp black pepper (0.5 g)

For the Spinach & Feta Filling:

• 4 cups fresh baby spinach (120 g)
• 1 cup crumbled feta cheese (150 g)
• ½ cup ricotta cheese (125 g)
• 1 garlic clove, finely minced (3 g)
• ¼ tsp ground nutmeg (0.5 g)
• ¼ tsp salt (1 g)
• ¼ tsp black pepper (0.5 g)

For the Sage Brown Butter:

• 5 tbsp unsalted butter (70 g)
• 8 fresh sage leaves (5 g)
• 1 garlic clove, thinly sliced (3 g)

For the Walnut & Cranberry Topping:

• ½ cup walnuts, roughly chopped (60 g)
• ⅓ cup dried cranberries (55 g)
• 2 tbsp grated Parmesan cheese (15 g)

For Finishing:

• 1 tbsp fresh sage leaves, finely chopped (2 g)
• 1 tbsp olive oil (15 ml)

How to Make It

1. Roast the Vegetables

Preheat the oven to 400°F (200°C). Line two large baking sheets with parchment paper. Arrange the sweet potato and butternut squash slices in a single layer, keeping them as evenly spaced as possible. Brush with olive oil and season with salt and black pepper.

Roast for 20–25 minutes, turning the vegetables once halfway through cooking. They should be tender and lightly golden around the edges without becoming too soft to layer.

2. Prepare the Spinach & Feta Filling

While the vegetables roast, place the baby spinach in a large skillet over medium heat. Cook for 2–3 minutes, stirring occasionally, until the spinach is wilted.

Allow the spinach to cool slightly, then squeeze out as much excess moisture as possible. Roughly chop the spinach and combine it with the feta, ricotta, minced garlic, nutmeg, salt, and black pepper. Stir until the filling is evenly combined.

3. Make the Sage Brown Butter

Melt the butter in a small skillet over medium heat. Add the sage leaves and sliced garlic and cook for 3–5 minutes, swirling the pan occasionally. Continue until the butter turns golden and fragrant and the sage becomes crisp.

Remove the skillet from the heat and set the sage brown butter aside.

4. Prepare the Baking Dish

Reduce the oven temperature to 375°F (190°C). Lightly grease a 9-inch (23 cm) baking dish, or use a round oven-safe dish if making individual-style stacks.

5. Build the Lasagna Stacks

Begin layering the roasted sweet potato, roasted butternut squash, and spoonfuls of the spinach-feta filling. Continue building the layers until the vegetables and filling have been used, finishing with a layer of sweet potato or butternut squash.

6. Add the Toppings

Drizzle the sage brown butter over the tops of the stacks. Sprinkle evenly with the chopped walnuts, dried cranberries, and grated Parmesan cheese.

7. Bake Until Golden

Bake at 375°F (190°C) for 15–20 minutes, until the cheese is warm and lightly golden and the edges are crisp.

8. Rest and Finish

Let the lasagna stacks rest for 5 minutes before serving. Finish with freshly chopped sage and a light drizzle of olive oil just before bringing them to the table.

Why This Recipe Works

The combination of sweet potato and butternut squash creates naturally sweet, tender layers that pair beautifully with the creamy spinach, feta, and ricotta filling. Roasting the vegetables first concentrates their flavour and gives the edges a lightly golden finish, making the stacks more flavourful than simply baking the vegetables from raw.

The sage brown butter adds a rich, aromatic finish, while walnuts provide crunch and dried cranberries bring little bursts of sweet-tart flavour. Parmesan helps the topping become lightly golden in the oven, giving each serving a satisfying contrast of creamy, crisp, sweet, and savoury textures.

Tips for the Best Sweet Potato & Butternut Lasagna Stacks

• Slice evenly: Keep the sweet potato and butternut squash slices similar in thickness so they roast at the same rate.
• Remove excess spinach moisture: Squeezing the cooked spinach well helps keep the filling creamy rather than watery.
• Watch the brown butter: Stay close to the skillet as the butter browns because it can move from golden to overly dark quickly.
• Do not overfill: Use moderate spoonfuls of the spinach-feta mixture so the layers remain stable when served.
• Rest before serving: A short 5-minute rest allows the layers to settle and makes the stacks easier to serve.

Serving Suggestions

Serve these lasagna stacks warm as a vegetarian main course alongside a simple green salad, roasted vegetables, or crusty bread. The combination of creamy filling, roasted vegetables, crunchy walnuts, and cranberries makes the dish satisfying enough to stand on its own.

For a festive presentation, finish each serving with a few extra cranberries, toasted walnuts, and fresh sage leaves. A small drizzle of olive oil just before serving adds a polished final touch.

Frequently Asked Questions

Can I use frozen spinach?

Yes. Frozen spinach can be used in place of fresh spinach. Thaw it completely and squeeze out as much excess moisture as possible before mixing it with the feta and ricotta.

Can I prepare the vegetables ahead of time?

Yes. The roasted sweet potato and butternut squash can be prepared ahead and refrigerated until you are ready to assemble the stacks. Bring the vegetables out when preparing the dish so the layering is easier.

Can I use a different cheese?

Yes. Feta provides a salty, tangy flavour, while ricotta gives the filling a creamy texture. You can adjust the cheese combination to suit your preference while keeping a creamy cheese in the filling.

How do I keep the walnuts crunchy?

Add the walnuts near the end of the preparation and avoid covering the dish after baking. This helps preserve their toasted texture.

Can I make the sage brown butter ahead?

Yes. The sage brown butter can be prepared ahead and gently rewarmed before drizzling over the assembled stacks. Avoid overheating it when reheating.

How should leftovers be stored?

Allow the leftovers to cool, then store them covered in the refrigerator. Reheat gently in the oven until warmed through. The walnuts may soften slightly after refrigeration.

Nutrition & Timing

Details	Amount
Servings	6
Prep Time	20 minutes
Cook Time	40–45 minutes
Total Time	60–65 minutes
Calories	425
Protein	11 g
Carbohydrates	43 g
Fat	25 g
Fiber	7 g
Sugar	16 g
Sodium	470 mg

Final Thoughts

This Savory Sweet Potato & Butternut Lasagna Stack brings together roasted seasonal vegetables, creamy spinach and feta, fragrant sage brown butter, and a colourful walnut and cranberry topping. It is comforting without relying on traditional pasta layers, while still delivering the layered feel of a classic lasagna.

With its combination of warm roasted vegetables, creamy cheese, crisp walnuts, and sweet-tart cranberries, this dish is especially well suited to a cosy family meal or a festive table. Letting the stacks rest briefly before serving helps the layers settle while keeping the topping pleasantly crisp.

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