1 pkg. frozen broccoli, boiled until tender
1 tbsp. grated onion
1 can cream of mushroom soup
1 c. cheese crackers, crushed
1 c. grated Cheddar cheese
1/2 c. mayonnaise
3 chicken breasts, cooked and diced
1 egg, beaten

Mix all ingredients, top with grated cheese. Bake at 400 degrees for 20-30 minutes.