How to Make It
Cook shells according to package directions, omitting salt and fat. Drain and set aside.
Position knife blade in food processor bowl; add beans and next 6 ingredients. Process until smooth, stopping once to scrape down sides.
Coat a large nonstick skillet with cooking spray. Place over medium-high heat until hot. Add mushrooms and onion; saute until tender. Add chopped tomato and next 6 ingredients; stir well. Bring to a boil; cover, reduce heat, and simmer 15 minutes, stirring occasionally. Uncover and cook 15 additional minutes. Remove and discard bay leaf. Set aside.
Spoon bean mixture evenly into shells. Spoon 1 cup tomato mixture into an 11- x 7- x 1 1/2-inch baking dish coated with cooking spray. Arrange shells in prepared dish. Pour remaining tomato mixture over shells. Top with mozzarella cheese.
Cover and bake at 350° for 20 minutes. Uncover and bake 10 additional minutes.
Oxmoor House Cooking Light Collection