Broccoli Chicken Divan

Name: Broccoli Chicken Divan
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 4 chicken breasts (about 2 pounds (or 3 cups cooked chicken), cut into bite size pieces); 1 Tablespoon olive oil (if using raw chicken breasts); 1 ½-2 pounds broccoli (cut into bite sized pieces); 1 ½ cups cheddar cheese (shredded, divided); 10 ½ ounces condensed cream of mushroom soup (1 can (or cream of chicken soup)); ⅔ cup sour cream; ½ cup milk; ½ teaspoon each garlic powder, onion powder, dry mustard powder, and pepper; ¼ teaspoon kosher salt; 3 Tablespoons Panko bread crumbs (or buttery crackers (like Ritz crackers)); 1 Tablespoon melted butter