Step 1

Preheat oven to 350° F. Cook manicotti shells according to package directions; drain. Rinse with cold water and drain again. Set aside.

Step 2

Meanwhile, for filling, coat an unheated large nonstick skillet with nonstick cooking spray. Preheat over medium heat. Add mushrooms, carrots, and garlic to hot skillet. Cook for 3 to 5 minutes or just until vegetables are tender, stirring occasionally. Remove from heat; cool slightly. Stir in ricotta cheese, 1/2 cup of the mozzarella cheese, the eggs, Parmesan cheese, and Italian seasoning. Spoon filling into cooked manicotti shells.

Step 3

For sauce, place undrained tomatoes in a blender or food processor. Cover and blend or process until smooth. Stir in roasted red peppers. Spread about 1/3 cup of the sauce into the bottoms of four 12- to 16-ounce ungreased individual baking dishes or a 2-quart rectangular baking dish. Arrange stuffed manicotti shells in individual baking dishes or large baking dish, overlapping shells slightly if necessary. Pour remaining sauce over manicotti.

Step 4

Bake, covered, for 20 to 25 minutes for individual baking dishes or 35 to 40 minutes for large baking dish or until heated through. Uncover and sprinkle with the remaining 1/4 cup mozzarella cheese. Bake for 5 minutes more. Let stand for 10 minutes before serving.