Ingredients for - Make-Ahead Chicken Divan Casserole

1. Grated Cheddar cheese 1 ½ cups
2. Shredded Parmesan cheese, or more to taste ½ cup
3. Fresh broccoli florets 4 cups
4. Salted butter 1 tablespoon
5. Sliced fresh mushrooms 1 (8 ounce) package
6. Diced onion ½ cup
7. Garlic, minced 3 cloves
8. Condensed cream of mushroom soup 1 (10.5 ounce) can
9. Sour cream ½ cup
10. Milk ½ cup
11. Mayonnaise ¼ cup
12. Salt and ground black pepper to taste ¼ cup
13. Cooked rice, or more to taste 2 cups
14. Shredded cooked chicken, or more to taste 5 cups

How to cook deliciously - Make-Ahead Chicken Divan Casserole

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C).

2 . Stage

Combine Cheddar cheese and 1/2 cup Parmesan cheese in a bowl and set aside.

3 . Stage

Place a steamer insert into a saucepan and fill with water to just below the bottom of the steamer. Bring water to a boil. Add broccoli, cover, and steam until tender, 2 to 6 minutes.

4 . Stage

Meanwhile, melt butter in a large skillet over medium heat. Add mushrooms, onion, and garlic; saute until soft, 5 to 7 minutes.

5 . Stage

Whisk condensed soup, sour cream, milk, and mayonnaise together in a large bowl. Add 1/2 cup of the reserved Cheddar-Parmesan mixture and season with salt and pepper. Add the sauteed vegetables and stir to combine the sauce.

6 . Stage

Spread 1/2 cup of the sauce onto the bottom of a 9x13-inch casserole dish. Add cooked rice as the bottom layer. Add cooked broccoli as the next layer, and then layer on the cooked chicken. Cover with remaining sauce. Pat down evenly and smooth with a spatula.

7 . Stage

Bake in the preheated oven for 30 minutes. Sprinkle with remaining Cheddar-Parmesan mixture, plus extra Parmesan if desired, and continue to bake until browned, about 15 minutes more.