Cheesy Chicken, Broccoli and Rice Casserole

Name: Cheesy Chicken, Broccoli and Rice Casserole
Prep time: 15 min
Cook time: 1 h 10 min
Total time: 1 h 25 min
Cuisine: American
Ingredients: 1/2 onion, (diced (may substitute with 1 teaspoon onion powder)); 3 cloves garlic, (minced (may substitute with 1 teaspoon garlic powder)); 3 tablespoons salted butter or ghee; 3 tablespoons flour,; 2 1/2 teaspoons coarse salt; 1/4 teaspoon black pepper; 1 teaspoon dried thyme; 3 cups chicken broth; 2 cups milk or full-fat coconut milk; 1 1/2 cups white rice; 1 1/2 pounds boneless, (skinless chicken breast, cut into 1-inch cubes); 3/4 pound broccoli florets, (about 5 cups); 2 cups shredded cheddar cheese