PREPARATION:
- Preheat oven to 375°F. Spray 13X9-inch baking dish or lasagna pan with nonstick cooking spray.
- Heat oil in large skillet over medium heat until hot. Add zucchini, mushrooms, onion and garlic. Cook and stir 5 minutes or until vegetables are tender. Set aside.
- Combine ricotta cheese, eggs, Parmesan cheese, Italian seasoning, garlic salt and pepper in medium bowl. Combine tomatoes and spaghetti sauce in another medium bowl.
- Spread about 3/4 cup tomato mixture in prepared dish. Place layer of noodles over tomato mixture, overlapping noodles. Spread half of vegetable mixture over noodles; top with half of ricotta mixture. Sprinkle 1 cup mozzarella over ricotta mixture. Place second layer of noodles over mozzarella. Spread about 1 cup tomato mixture over noodles. Top with remaining vegetable and ricotta cheese mixtures. Sprinkle 1 cup mozzarella over ricotta mixture. Place third layer of noodles over mozzarella. Spread remaining tomato mixture over noodles. Sprinkle remaining 2 cups mozzarella evenly over top.
- Cover tightly with foil and bake 1 hour or until noodles in center are soft. Uncover; bake 5 minutes or until cheese is melted and lightly browned. Remove from oven; cover and let stand 15 minutes before serving.
