1 Prepare lasagne according to package directions. While lasagne is cooking, heat oven to 425-o F.2 Coat a shallow metal roasting pan with cooking spray. Add mushrooms, squash, bell peppers and onion. In a small dish, combine vinegar, oil, garlic and rosemary; brush evenly over vegetables3 Bake vegetables 15 minutes; toss vegetables. Continue baking 8 to 10 minutes or until vegetables are browned and tender.4 Spoon 1 cup spaghetti sauce over bottom of 13 x 9-inch baking dish. Arrange 4 pieces of lasagne (3 lengthwise, 1 widthwise) over the sauce.5 Cover lasagne with 1 cup sauce. In a medium bowl, combine ricotta cheese, spinach, egg white and hot red pepper flakes6 Drop half the cheese mixture by spoonfuls over sauce; arrange half of the roasted vegetables between spoonfuls of cheese mixture7 Arrange another 4 pieces of lasagne over cheese and vegetables, pressing lightly; top with 1 cup sauce. 8 Repeat layering with remaining cheese, roasted vegetables, 4 pieces of lasagne and remaining sauce.9 Reduce oven temperature to 375-o F. Cover lasagne with foil; bake 45 minutes. Uncover; sprinkle with mozzarella and Parmesan cheese; continue baking, uncovered, 5 minutes or until cheese is melted.10 Let stand 10 minutes before serving.