This vegetarian spinach and ricotta lasagna is a fantastic casserole dinner recipe, perfect for a comforting meal. You’ll love how easy it is to assemble and how delicious it tastes, making it a guaranteed crowd-pleaser.
Key Ingredients & Substitutions:
- Lasagna Noodles: Use oven-ready to save time, or traditional if you prefer to boil them.
- Ricotta Cheese: Cottage cheese can be used as a substitute for a lighter option.
- Fresh Spinach: Frozen spinach (thawed and squeezed dry) works just as well.
- Marinara Sauce: Choose your favorite jarred sauce for convenience.
- Mozzarella Cheese: Provolone or a blend of Italian cheeses can be used instead.
Ingredients:
For the Lasagna:
- 12-15 oven-ready lasagna noodles
- 1 tablespoon olive oil
- 1 medium onion, finely chopped
- 2 cloves garlic, minced
- 16 ounces fresh spinach, roughly chopped
- 15 ounces ricotta cheese
- 1 large egg
- 1/2 cup grated Parmesan cheese, plus more for topping
- 1 teaspoon dried oregano
- 1/2 teaspoon dried basil
- Salt and black pepper to taste
- 24 ounces marinara sauce
- 2 cups shredded mozzarella cheese
How Much Time Will You Need?
- Total Time: 1 hour 15 minutes
- Prep Time: 25 minutes
- Cook Time: 50 minutes
- Servings: 6-8
- Tools Needed: 9×13 inch baking dish, large skillet
Step-by-Step Instructions:
1. Prepare the Spinach Mixture
Heat olive oil in a large skillet over medium heat. Sauté the chopped onion until softened, about 5 minutes. Add the minced garlic and spinach, cooking until the spinach wilts down, then remove from heat.
2. Make the Ricotta Filling
In a large bowl, combine ricotta cheese, egg, 1/2 cup Parmesan cheese, oregano, basil, salt, and pepper. Stir in the cooked spinach mixture until well combined. This creamy filling is the heart of your casserole dinner recipe.
3. Assemble the First Layer
Spread about 1/2 cup of marinara sauce on the bottom of your 9×13 inch baking dish. Arrange a single layer of lasagna noodles over the sauce. You’re building a delicious casserole dinner recipe!
4. Add Ricotta and Mozzarella
Spread half of the ricotta-spinach mixture evenly over the noodles. Top with about 1 cup of marinara sauce, then sprinkle with 1 cup of shredded mozzarella cheese.
5. Create the Second Layer
Place another layer of lasagna noodles over the mozzarella. Spread the remaining ricotta-spinach mixture on top. Cover with another cup of marinara sauce and half of the remaining mozzarella.
6. Finish and Bake Your Casserole Dinner
Add the final layer of noodles. Top with the remaining marinara sauce and mozzarella cheese, plus an extra sprinkle of Parmesan. Cover the dish with foil and bake at 375°F (190°C) for 30 minutes. Remove the foil and bake for another 20 minutes, or until bubbly and golden. Let it rest for 10 minutes before serving this delightful casserole dinner recipe.
Variation Ideas:
- Add More Veggies: Include sautéed mushrooms, bell peppers, or zucchini to the spinach mixture.
- Spice It Up: A pinch of red pepper flakes in the sauce adds a nice kick.
- Different Cheeses: Experiment with provolone, fontina, or a sharp white cheddar.
Storage Instructions:
Store leftover lasagna tightly covered in the refrigerator for up to 3-4 days. To reheat, cover and bake in the oven at 350°F (175°C) until warmed through, or microwave individual portions.
Frequently Asked Questions (FAQ):
Can I use fresh lasagna noodles?
Yes, you can. Follow the package directions for cooking time, as fresh noodles often require less baking.
Can I make this lasagna ahead of time?
Absolutely! Assemble the lasagna, cover it tightly, and refrigerate for up to 24 hours before baking. Add about 10-15 minutes to the covered baking time if baking from cold.
What if I don’t have fresh spinach?
You can use frozen spinach. Make sure to thaw it completely and squeeze out as much excess water as possible before adding it to the ricotta mixture.
Can I freeze this casserole dinner recipe?
Yes, you can. Assemble and bake the lasagna, then let it cool completely. Wrap it tightly in plastic wrap and foil. It can be frozen for up to 3 months. Thaw overnight in the refrigerator before reheating.
Why is my lasagna watery?
This often happens if the spinach isn’t squeezed dry enough or if the ricotta mixture has too much moisture. Ensure your spinach is very dry.
Do I have to use an egg in the ricotta mixture?
The egg helps bind the ricotta mixture, preventing it from becoming too loose. While you can omit it, the texture might be slightly different.

