Mississippi Chicken Casserole

Mississippi Chicken Casserole
1 1/2-2 lbs boneless skinless chicken breasts
1 onion, chopped
1 teaspoon seasoning salt
1 (8 ounce) package wide egg noodles
2 (10 ounce) cans condensed cream of chicken soup (can substitute cream of mushroom, I just prefer chicken)
2 cups crushed Ritz crackers (about one sleeve)
8 ounces sour cream
Preheat oven to 350 degrees. Cut chicken into bite size pieces and saute chicken and onion until chicken is done. Prepare egg noodles according to package directions.
In 9X13 casserole dish, combine chicken, onions, soup, and noodles. Mix well. Combine crackers, butter, and sour cream well and spread over chicken. The mixture will be very thick. Bake for thirty minutes or until top is brown.