1/2 cup butter or margarine (melted)
1 tbsp Worcestershire sauce
1 tsp ground mustard
1/2 tsp garlic salt
1/4 tsp pepper
4 boneless skinless chicken breast halves
1 can (6 oz) crushed french-fried onions (original or cheddar)  

In a shallow bowl, combine the butter, Worcestershire sauce, mustard, garlic salt and pepper.  Dip chicken in the butter mixture, then coat with onions.  Place in a greased 9-in baking pan.  Top with any remaining onion; drizzle with any remaining butter mixture.  Bake, uncovered, at 350 degrees for 30-35 minutes or until juices run clear.