1 package (10 ounces) frozen cream-style corn
1/2 teaspoon olive oil
1 cup frozen chopped onions
1 teaspoon bottled minced garlic
1 can (14 1/2 ounces) fat-free chicken broth
1 can (10 3/4 ounces) reduced-fat cream of chicken soup (see note)
1 can (4 1/2 ounces) chopped chilies
1 can (5 ounces) premium cooked chicken breast meat
1/2 teaspoon chili powder, or more to taste
1/2 teaspoon ground cumin
1 cup low-fat milk
Shredded Mexican-blend cheese, optional garnish