In a saucepan stir together 5 cups of the meat mixture from Spicy Beef Sloppy Joes, one 15-ounce can black beans, rinsed and drained; one 2-1/4 ounce can sliced pitted ripe olives, drained; and 1 teaspoon taco seasoning. Heat to boiling; reduce heat. Simmer, covered, 10 minutes.To serve, cut 1 head of lettuce into 6 slices. Place slices of lettuce on serving plates. Add meat mixture. Top with 1 cup shredded cheddar cheese, 1 cup chopped tomatoes, and 1/3 cup sour cream. Add tortilla chips as desired.
For Easy Cleanup:
Line your slow cooker with a disposable slow cooker liner. Add ingredients as directed in recipe. Once your dish is finished cooking, spoon the food out of your slow cooker and simply dispose of the liner. Do not lift or transport the disposable liner with food inside.