Chicken Casserole with biscuit

1 lb white meat chicken , cooked and cubed 1 (10 3/4 ounce) can cream of chicken soup (I use Campbell's) 1/2 cup milk 1/2 teaspoon salt 1/2 teaspoon pepper 1[...]

4 cups cooked rice 1 red onion , chopped 1 red bell pepper , chopped 2 garlic cloves , crushed 1 whole store bought rotisserie-cooked chicken 2 cups barbecue[...]