Chicken Chili Chowder

Name: Chicken Chili Chowder
Ingredients: 1 medium onion (chopped); 2 teaspoons canola oil; 5 medium red potatoes (cubed); 1 can ((14-1/2 ounces) chicken broth); 1 can ((10-3/4 ounces) condensed cream of chicken soup, undiluted); 1/2 cup salsa verde; 1 teaspoon chili powder; 1/2 teaspoon garlic powder; 1/2 teaspoon ground cumin; 1/2 teaspoon pepper; 1/4 teaspoon salt; 2 cups cubed cooked chicken breast; 1 can ((15-1/2 ounces) great northern beans, rinsed and drained); 1 can ((14-3/4 ounces) cream-style corn); 1/2 cup sour cream; Shredded cheddar cheese and additional sour cream for topping (, optional)