Elevate your lasagna game with this vegetarian version that swaps in plant-based sausage and crumbles for a hearty, satisfying dish. It's a meat eater-approved recipe!
In a Dutch oven over medium heat, warm up the olive oil. Add onion and garlic; cook, stirring frequently, until softened, about 5 minutes. Stir in crushed tomatoes, tomato sauce, plant-based sausage, meat substitute crumbles, tomato paste, water, 1 tbsp parsley, sugar, 1/2 tsp salt, basil, Italian seasoning, fennel seeds, and pepper. Bring to a boil, then reduce heat; simmer, covered, occasionally stirring, until thickened, around 1.5 hours.
Get a large pot of salty water to a boil. Insert lasagna noodles; cook, occasionally stirring, until tender but firm, about 8 to 10 minutes. Drain and rinse noodles under cold water.
Preheat the oven to 375°F (190°C).
While waiting, mix ricotta, remaining 2 tbsp parsley, egg, and remaining 1/2 tsp salt in a bowl.
Build layers in a 9x13-inch baking dish: spread 1/3 sauce, arrange 6 noodles, apply half ricotta mixture, top with 1/3 mozzarella slices, spoon over 1/3 sauce, sprinkle with 1/4 cup Parmesan. Repeat layers; top with remaining mozzarella and Parmesan. Lightly coat aluminum foil with cooking spray; cover the dish, foil side down.
Bake for 25 minutes, then remove foil and bake until hot and bubbly, approximately 25 minutes more. Let it rest for 15 minutes before slicing into 12 portions.
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