Tortilla Soup
["1 onion, chopped", "2 cloves garlic, minced", "1 Tbsp. vegetable oil", "1 (10 1/2 oz.) can chopped tomatoes with green chilies, drained", "1 (14 1/2 to 16 oz.) can pureed tomatoes", "3 c. chicken stock", "1 tsp. chili powder", "1 tsp. cumin", "4 corn tortillas, cut in 1/4-inch", "1 c. diced cooked chicken", "diced avocado, grated Monterey Jack cheese, Cheddar cheese or sour cream for garnish (optional)"]
["Combine ingredients, except corn tortillas.", "Simmer soup slowly.", "Before serving, crisp tortilla strips in skillet with small amount of oil.", "Add to soup before serving."]
["onion", "garlic", "vegetable oil", "tomatoes", "tomatoes", "chicken stock", "chili powder", "cumin", "corn tortillas", "chicken", "avocado"]