Prepare Tortilla Cups; set aside. In a medium saucepan cook ground beef and garlic until beef is brown. Drain off fat. Stir in kidney beans, taco sauce, and, if desired, corn. Bring to boiling; reduce heat. Simmer, covered, for 10 minutes.

Meanwhile, in a very large bowl combine lettuce, tomatoes, sweet pepper, and green onions. To serve, divide lettuce mixture among the Tortilla Cups. Top each serving with some of the meat mixture and avocado. Sprinkle with cheese. If desired, serve with sour cream. Makes 6 main-dish servings.

Note: If tortilla cups are not available, prepare cups using flour tortillas. Lightly brush 1 side of six 9- or 10-inch flour tortillas with a small amount of water or slightly coat with nonstick cooking spray. Coat six small oven-safe bowls or six 16-ounce individual casseroles with nonstick cooking spray. Press tortillas, coated sides up, into prepared bowls or casseroles. Place a ball of foil in each tortilla cup. Bake in a 350 degrees F oven for 15 to 20 minutes or until light brown. Remove the foil; let tortilla cups cool. Remove cups from the bowls. Serve cups immediately or store in an airtight container for up to 5 days.