Mom's Chicken Tortilla Soup

This was my favorite soup growing up. My mom would make a ton of it in the crock-pot and it would last all week. Once my appetite came back during my first pregnancy, I made a big batch and ate nothing else for a week.
And how is it that soup just keeps getting better the more you reheat it?

Chicken Tortilla Soup
Saute the following together:
2 tbs canola or olive oil
4 oz can chopped green chilies
1/2 tsp garlic powder
1 medium onion, chopped

Combine in crock-pot:
4 cups chicken broth
15oz can diced tomatoes
15 oz can tomato sauce
1 cup water
23 oz can Ranch Style Beans (drained)
1/4 tsp cumin
1/2 tsp chili powder
1 tsp instant beef bouillon
2 tsp instant chicken bouillon

Mix together in small bowl then add to soup:
2 tbs corn starch
1/2 cup water

Add sauteed mixture to soup, then add:
1 cup frozen corn
2 cups cooked chicken

Cook on high 4 hours, or on low 6-8.
Garnish with cheese, sour cream; serve with tortilla chips