You need this cheesy chicken casserole in your weeknight repertoire.

Everything is melted and warmed through in the oven.

Coat a 13- x 9-inch baking dish with cooking spray; set aside.

Southern Living Cheesy Chicken Casserole with a serving scooped out

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Cook pasta:

Cook pasta according to package directions; drain.

Cook chicken:

Meanwhile, heat oil in a large skillet over medium-high.

Add onion to pan; saute until almost tender, about 5 minutes.

Southern Living Cheesy Chicken Casserole ingredients

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Add chicken and garlic to pan; sprinkle evenly with salt and pepper.

Cook until chicken is cooked through, about 8 minutes, stirring occasionally.

Add casserole mixture to baking dish:

Spoon mixture into prepared baking dish.

Southern Living Cheesy Chicken Casserole after baking ready to serve

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Sprinkle remaining colby Jack on top.

Garnish with parsley, if desired.

Southern Living Cheesy Chicken Casserole spraying the baking dish with cooking spray

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole cooking the pasta

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole cooking the chicken

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole stirring the soup, sour cream, and cheese into the chicken mixture

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole stirring in the pasta

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole sprinkling the casserole with cheese before baking

Credit:Caitlin Bensel; Food Stylist: Torie Cox

Southern Living Cheesy Chicken Casserole afte baking ready to serve

Credit:Caitlin Bensel; Food Stylist: Torie Cox