Full of flavor and hearty veggies, this truly is the Best Vegetarian Lasagna! Smothered in tender pasta, exquisite sauce and melty cheese this Lasagna is going to hit the spot! And I promise you won't miss the meat!
In a large skillet over medium high heat add the olive oil. Add in the zucchini, mushrooms, carrots and onion and sauté until tender. Add in the spinach and continue to cook until it starts to wilt.
Add crushed tomatoes, tomato sauce, tomato paste, Italian seasoning, sugar, and basil. Let simmer on low heat.
In a large pot, bring the water to a boil. Add the lasagna noodles and cook for 8-10 minutes. Drain and rinse in cold water.
In medium sized bowl add the ricotta cheese, parmesan, and egg. Mix until incorporated.
Preheat oven to 375 degrees and spray a 9x13 inch pan with non stick spray and set aside.
To make the lasagna start by spreading 1 cup of the vegetable sauce on the bottom. Arrange the noodles in a single layer over the sauce. Spread 1/2 cup of the ricotta cheese, on top of the noodles followed by shredded mozzarella cheese. Repeat the layers and top with cheese.
Cover with aluminum foil and bake for 20 minutes. Remove the foil and bake and additional 20-25 minutes or until it is heated throughout and cheese is bubbly. Let it cool for 10 minutes before serving.