Combine soup and taco seasoning mix in a bowl. Cut each tortilla into 6 wedges. Spoon 1/4 of ground beef into crock pot. Top with 1/4 of tortilla wedges. Spoon 1/4 of soup mixture over tortillas. Top with 1/4 of tomatoes. Repeat layers 3 rimes. Cover and cook on low 6-8 hours. To serve , spoon onto plate and add toppings. Makes 6 servings.