Ham Cheese Potato Delight

1/4 cup green onion, chopped
1/4 cup mayonnaise
1 cup shredded cheese
3/4 cup milk
2 cups diced cooked ham
3 cups diced cooked potatoes
Salt and pepper

Cook onion. Mix in potato, ham, and mayonnaise. Mix cheese and milk in saucepan, melt. Pour on potatoes and bake 30 minutes at 350 degrees.