Classic Vegetarian Lasagna Recipe with Spinach and Ricotta

Lighten up your lasagna without sacrificing flavor. This Vegetarian Lasagna is layered with zucchini, mushrooms, spinach and creamy ricotta for a satisfying meatless Italian main course that appeals to vegetarians and meat-eaters alike.

Lasagna is the ultimate comfort food: saucy, cheesy and deeply satisfying. While classic lasagna often relies on a meat sauce, this vegetarian version proves that a rich, flavorful vegetable filling can be just as comforting and delicious. The trick is building a hearty, well-seasoned vegetable sauce and a creamy, well-bound cheese layer so every slice holds together.

This recipe is flexible and forgiving — you can swap in seasonal vegetables or pantry staples, and you can easily adapt it to be gluten-free or vegan. Below are the essentials and a straightforward method to make a reliable, crowd-pleasing vegetarian lasagna.

Three simple secrets for the best vegetarian lasagna:

1. Dice vegetables small for an even-textured sauce that layers nicely between noodles.
2. Drain excess liquid after sautéing the vegetables to prevent a watery lasagna.
3. Mix an egg into the ricotta (or a binder alternative for vegan versions) so the cheese layer sets and slices cleanly.

Ingredients

• Lasagna noodles – Classic or no-boil noodles work; no-boil saves time.
• Whole milk ricotta cheese – For a creamy, rich filling; cottage cheese can substitute.
• Egg – Mixed into the ricotta to bind the cheese layer; omit for vegan versions and use a binder like silken tofu or cornstarch-thickened tofu ricotta.
• Italian seasoning – A blend of dried herbs (oregano, basil, thyme, rosemary) to flavor the sauce and cheese.
• Low-moisture mozzarella – Prevents excess water and creates a bubbly top layer.
• Olive oil – For sautéing the vegetables.
• Baby bella or button mushrooms – Small-diced so they blend into the sauce.
• Zucchini – Small-diced; summer squash is a good alternative.
• Onion – Adds sweetness and depth.
• Garlic – Minced for aroma and flavor.
• Baby spinach – Adds color, nutrients and a tender texture.
• Tomato paste – Thickens the sauce and concentrates tomato flavor so the lasagna isn’t watery.
• Tomato sauce – The base of the vegetable sauce.
• Petite diced tomatoes – For bite and texture.
• Salt – To taste; balances and enhances the flavors.

Instructions

• Prepare the vegetable sauce
  • Heat 2 tablespoons olive oil in a large skillet over medium-high heat.
  • Add diced mushrooms, diced zucchini and diced onion. Sauté 6–8 minutes until softened and lightly browned. A small dice gives the best texture for layering.
  • Carefully drain any liquid from the skillet to avoid a watery final dish.
  • Return the skillet to the heat, add minced garlic and baby spinach, and sauté 1–2 minutes until the spinach wilts.
  • Stir in tomato paste, then add tomato sauce, diced tomatoes, about 3 tablespoons Italian seasoning and 2 teaspoons salt.
  • Bring to a simmer, reduce heat to low, cover and let simmer 20 minutes to meld flavors and thicken the sauce.
• Prepare noodles and cheese
  • Preheat oven to 375°F (190°C).
  • If using traditional noodles, boil in a large pot of salted water until al dente (about 4–5 minutes), drain and lay out in a single layer so they don’t stick. No-boil noodles can skip this step.
  • In a bowl, combine 15 ounces whole milk ricotta, 1 egg, 1 tablespoon Italian seasoning and 1/4 cup shredded mozzarella. Set aside.
• Assemble the lasagna
  • Place 3 lasagna noodles in the bottom of a 9×13-inch baking dish.
  • Spread a layer of the ricotta mixture over the noodles, then add a layer of the vegetable sauce.
  • Repeat layers (noodles, ricotta, sauce) two more times.
  • Finish with the final 3 noodles on top and cover with the remaining shredded mozzarella (about 2 3/4 cups divided use).
• Bake
  • Tent tightly with aluminum foil and bake 30 minutes.
  • Remove foil and bake an additional 15–20 minutes until cheese is golden and bubbling.
  • Let the lasagna rest 15–20 minutes before slicing so the layers set cleanly. Garnish with freshly grated Parmesan, basil or red pepper flakes if desired.