Hot Chicken-Cheese Foil Sandwich on a Bun

Combine and spread on a bun:
1 C. diced chicken
1 C. diced cheddar cheese
3 hard boiled eggs
2 T. sliced olives
2 T. sweet pickle, chopped
2 T. green pepper
½ C. mayonnaise
Wrap in foil and heat in oven at 325 degrees for 25 minutes.