Easy Mushroom and Spinach Lasagna
Indulge in a delightful and incredibly easy vegetarian lasagna, packed with savory mushrooms and fresh spinach. This comforting dish uses common supermarket ingredients and oven-ready noodles, making it perfect for a weeknight family meal with minimal fuss.

1Ingredients
- 9 sheetsOven-ready lasagna noodles
- 1 tablespoonOlive oil
- 1 medium, choppedYellow onion
- 2 cloves, mincedGarlic
- 8 ounces, slicedCremini mushrooms
- 5 ounces, roughly choppedFresh spinach
- 24 ounces (about 3 cups)Marinara sauce
- 15 ouncesRicotta cheese
- 1Large egg
- 0.5 cupGrated Parmesan cheese
- 2 cups, dividedShredded mozzarella cheese
- 0.5 teaspoonSalt
- 0.3 teaspoonBlack pepper
- 0.5 teaspoonDried basil
2Instructions
- 1
Preheat your oven to 375°F (190°C). Lightly grease a 9x9 inch baking dish or an 8x11 inch baking dish.
⏱ 5 min - 2
In a large skillet, heat olive oil over medium heat. Add chopped onion and sauté for 3-5 minutes until softened. Stir in minced garlic and sliced mushrooms, cooking for another 5-7 minutes until mushrooms are tender and have released their liquid.
⏱ 15 min - 3
Add the roughly chopped spinach to the skillet. Cook, stirring occasionally, until the spinach has completely wilted, about 2-3 minutes. Season the vegetable mixture with a pinch of salt and pepper. Remove from heat and set aside.
⏱ 5 min - 4
In a medium bowl, combine the ricotta cheese, egg, Parmesan cheese, 1/4 teaspoon salt, 1/8 teaspoon black pepper, and dried basil. Mix well until all ingredients are thoroughly combined.
⏱ 5 min - 5
Assemble the lasagna: Spread about 1/2 cup of marinara sauce evenly on the bottom of the prepared baking dish. Place three oven-ready lasagna noodles over the sauce. Spread half of the ricotta mixture over the noodles, then top with half of the mushroom and spinach mixture. Sprinkle with 1/2 cup of mozzarella cheese.
⏱ 5 min - 6
Repeat the layers: another 1/2 cup of marinara sauce, three noodles, the remaining ricotta mixture, the remaining mushroom and spinach mixture, and another 1/2 cup of mozzarella cheese.
⏱ 5 min - 7
Finish the lasagna with the final three noodles, the remaining marinara sauce, and the last cup of mozzarella cheese.
⏱ 2 min - 8
Cover the baking dish tightly with aluminum foil and bake for 30 minutes. Remove the foil and bake for an additional 5-10 minutes, or until the cheese is bubbly and lightly golden.
⏱ 40 min - 9
Remove the lasagna from the oven and let it rest for 10-15 minutes before slicing and serving. This allows the layers to set and makes for easier serving.
⏱ 15 min