Serious question. Do you really eat cheeseburgers with pineapple slices? I've never heard of such. It sounds strange - like a cheeseburger in paradise. hahahaha
But, then, I like pizza with Canadian bacon and pineapple, so maybe it would be good. Maybe I'll be adventurous and give it a chance.
While your hamburger patty is cooking, put a slice of pineapple and onion next to it. Turn it over and add cheese. Put them on a warm roll with a tomatoe slice and ketchup. It will be inside your stomach within seconds:)