Mac and Cheese ( cheese burger flavour)

this tastes exactly like a MacDonalds Cheese burger

Cheese and Mac

1 cup white sauce

2 cups grated cheese

4 cups cooked pasta

500g mince beef, browned

2 tbl american mustard

1/2 cup ketchup

1 onion diced, (cook if your family don't like raw onion)

mix all  ingredients together, leaving 1 cup grated cheese. place in baking dish and top with leftover cheese bake in a moderate oven for 15 minutes