Brown ground beef, onion, and garlic in a Dutch oven, Drain well, and return to pan. Add taco seasoning mix, stir well. Add chopped tomatoes and next 8 ingredients. Bring to a boil. Cover, reduce heat, and simmer 30 minutes. To serve, ladle soup into bowls. Garnish each serving with shredded lettuce, shredded cheese, chopped tomato, and corn chips.n