1 lb boneless beef round steak, cut into 1/2-inch cubes
1 jar (26 to 28 oz) marinara sauce
2 1/2 cups water
1 package (9 oz) refrigerated cheese-filled ravioli
1/2 cup grated Parmesan cheese

1. In 3 1/2- to 4-quart slow cooker, mix beef, marinara sauce and water.
2. Cover; cook on Low heat setting 8 to 10 hours.
3. Stir in ravioli. Increase heat setting to High. Cover; cook 20 to 30 minutes until ravioli are tender. Sprinkle individual servings with cheese.