Prep Time: 25
Cook Time: 45
Serves: Serves: 10
Spray large skillet with nonstick vegetable spray. Heat olive oil in large skillet over medium heat. Add onion and garlic; cook 5 minutes; stirring occasionally. Add tomato puree, tomatoes, tomato liquid, mushrooms, zucchini, bell pepper, basil, red pepper flakes, oregano and salt and sugar, if desired. Heat to a boil; reduce heat, cover and simmer 10 minutes.
Combine Ricotta cheese, spinach, egg whites and Parmesan cheese in bowl; set aside. Spread 1 cup tomato sauce mixture in bottom of 13x9-inch baking dish. Layer 3 lasagna noodles over sauce. Top with half the Ricotta cheese mixture and 2 cups sauce. Repeat layering with 3 more lasagna noodles, remaining Ricotta mixture and 2 cups sauce. Sprinkle with 3/4 cup Pizza Double Cheese. Top with remaining lasagna noodles and sauce.
Cover with foil; bake in preheated 375°F oven 30 minutes. Uncover; bake 15 minutes more. Sprinkle with remaining 3/4 cup Pizza Double Cheese. Let stand 10 minutes before serving.