Saute garlic in oil in a medium size pot. Stir in salsa, broth & lime juice, chili powder, cumin, oregano, cayenne. Bring to boil & simmer for 5-10 minutes. Add corn, beans, & chicken. Simmer for 10 minutes. Ladle soup into individual serving bowls & garnish with grated cheese, cilantro, chopped green onion, or crushed tortilla chips.