1/2 lb lean (at least 80%) ground beef
1/2 lb bulk Italian sausage
1 (15 oz) marinara sauce
1 cup sliced fresh mushrooms
1 can (14.5 oz) diced tomatoes with Italian herbs, undrained
1 package (9 oz) refrigerated cheese-filled tortellini
1 cup shredded mozzarella cheese or pizza cheese blend (4 oz)
In 10-inch skillet, cook beef and sausage over medium-high heat 5 to 7 minutes, stirring occasionally, until brown; drain.
Spray inside of 4- to 5-quart slow cooker with cooking spray. Mix beef mixture, marinara sauce, mushrooms and tomatoes in cooker.
Cover; cook on Low heat setting 7 to 8 hours.
Stir in tortellini; sprinkle with cheese. Cover; cook on Low heat setting about 15 minutes longer or until tortellini are tender.