Step 1

Bring chicken broth to a boil in a large pot then add rice. Cover then turn heat down to medium-low. When rice has 5 minutes left to cook add broccoli and green onions on top to steam.

Step 2

Meanwhile, heat extra virgin olive oil in a large skillet over medium-high heat. Add chicken, season with salt, pepper, and garlic powder, and then saute until no longer pink. Remove to a plate and set aside then very carefully wipe out skillet with a dry paper towel.

Step 3

Turn heat down to medium then whisk together flour and 1/2 cup milk in a small bowl. Pour mixture into skillet then add remaining 1-1/2 cups milk. Cook mixture, stirring constantly, until thickened, 7-10 minutes. Remove skillet from heat then add 3/4 of the shredded cheese, sour cream, salt, pepper, and garlic powder, and stir until smooth.

Step 4

Preheat broiler. Combine cooked rice and broccoli mixture with the cheese sauce and cooked chicken then scoop mixture into a nonstick sprayed 9x13 baking dish and top with remaining cheese. Broil until cheese is melted then let casserole rest for 5 minutes before serving.