- Preheat the oven to 375°F (190°C).
- In a baking dish, spread a layer of marinara sauce on the bottom.
- Layer half of the sweet potato slices over the sauce.
- Add half of the butternut squash slices on top of the sweet potatoes.
- Layer half of the carrot slices over the butternut squash.
- Spread half of the ricotta cheese over the vegetables.
- Sprinkle with half of the mozzarella and Parmesan cheese.
- Repeat the layers with the remaining ingredients, finishing with a layer of cheese on top.
- Cover with foil and bake for 30 minutes.
- Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden.
- Let it cool for a few minutes before slicing and serving.
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