mature english cheddar.
obviously!
I wonder where I can get some of this in the US? I am a lover of the queso. A good aged cheddar is perfect. Sharp? Mild?
as far as ketchup... I totally get it. When I have my grilled cheese for some reason I have to dip it in ketchup. But I loathe ketchup on a hotdog. Only mustard and relish please.