Add the chicken, seasonings, onion, cream of chicken soup, diced tomatoes, green chilies, and garlic to an 8-quart crockpot and stir. Cook on low for 4-5 hours or until the chicken is cooked.
1 pound skinless boneless chicken breasts, 10 ounce diced tomatoes with green chilies, 2 cans of cream of chicken soup, 1/2 cup diced onion, 1 teaspoon onion powder, 1 teaspoon paprika, 1 teaspoon salt, 1 teaspoon pepper, 2 Tablespoon minced garlic