When you think about it a cheeseburger is a balanced meal. I'll break it down for you:

Meat - protein
Bun - Carb
Tomato sauce -FRUIT
Onion- Vegetable
Pickle - Vegetable
Mustard - Condiment

So that's pretty much all the food groups covered and their getting their meat and 3 veg in one convenient little package
C'mon Tinks! get it right! Tomatoes are fruits! so you've covered more bases there...