Chicken Tortilla Soup

I've tried many a recipe of tortilla soup. This is the winner.

2 chicken breasts
1 onion, chopped
5 cloves garlic
1 avacado
canned minced jalapeno (1 tsp. for medium, more for spicy)
6 C. chicken stock
2 15 oz. cans chopped tomatoes
2 cans black beans

Sautee garlic and onion. Add chicken and cook well. Add 5 C. broth to a large pot. Add tomatoes, beans and simmer. Add canned jalapenos to desired spice level (I use 1/4 of the smallest cans). Serve with fresh avacado, cheddar and tortilla strips or chips. Also good with sour cream.