1 Tbsp. olive oil
1 pound boneless, skinless chicken breast halves, cut into 1/2-inch cubes
1 onion, chopped
2 cloves garlic, chopped
2 (15.5 oz.) cans great Northern beans, rinsed and drained
1 (14.5 oz.) can chicken broth
2 (4 oz.) cans chopped green chiles
1 tsp. salt
1 tsp. ground cumin
1 tsp. dried oregano
1/2 tsp. ground black pepper
1/4 tsp. cayenne pepper
1/4 cup cornstarch
2 Tbsp. butter
1 cup sour cream
1/2 cup heavy whipping cream