2 tablespoons olive oil
1 onion, chopped
1 1/2 (14 ounce) cans chicken broth
2 (15.5 ounce) cans great Northern beans
1 (4 ounce) can chopped green chile peppers
1 roasted chicken, bones and skin removed, meat torn into bite-size pieces
3 tablespoons ground cumin
2 tablespoons chili powder
2 tablespoons cayenne pepper
1 (8 ounce) container sour cream
1 (8 ounce) package shredded Monterey Jack cheese
Heat olive oil in a large saucepan over medium heat. Stir in onions, and cook until softened and translucent, about 3 minutes. Pour in chicken broth, great Northern beans, chopped chiles, and torn chicken. Season with cumin, chili powder, and cayenne pepper. Increase heat to medium-high to bring to a boil, then reduce heat to medium-low, and simmer for 10 minutes.
Stir in sour cream and simmer for 5 minutes. To serve, ladle into bowls and sprinkle with Monterey Jack cheese.