should be made on potato bread.
Buttered on each side.
cheddar cheese only (that's the orange kind for those confused).
no ham, no tomato, no weird sauce added.
cooked on a frying pan not with your iron or in the microwave
...and until the cheese begins to melt and each side is crispy.
cut diagonally only.
any other way is not a real Grilled Cheese.