Chicken Fiesta Casserole - cooking recipe

Ingredients

8 ounces thin spaghetti
4 boneless skinless chicken breast halves, cut into cubes
1/2 large onion, chopped
1/2 bell pepper, chopped
1 (10 ounce) can Fiesta nacho cheese soup
1 (10 ounce) can mild Rotel tomatoes & chilies, diced, not drained
1 (4 ounce) can sliced black olives, drained
8 ounces Velveeta cheese, cut into 1/2 inch cubes
6 ounces sliced mushrooms (divided)

Preparation

Cook spaghetti according to package directions until almost tender, drain. While spaghetti is cooking, mix next 8 ingredients and 6 ozs. mushrooms in large bowl.
Add spaghetti and mix well.
Spray a large casserole pan 9x13 with cooking spray.
Pour mixture into casserole.
Spread remaining mushrooms on top.
Bake covered at 350 degrees for 45 minutes to 1 hour until chicken is done.
Remove cover and bake additional 15 minutes until bubbly and slightly browned.