The only food where ketchup is close to king is hamburgers. But Piri Piri and Heinz57 sauce are both better.

Ketchup is good on hot dogs along with mustard, but mustard is superior.

Actually, I thought of one: a Philly style steak sandwich.

Mac n cheese

Hot dogs and Burgers

Hash browns

I do a mixture of ketchup, mayo, garlic powder, onion powder, and msg, and slap that on cold cut sandwiches!

cheese sandwich

Mix ketchup with either sour cream or mayo and put it on my eggs

Spaghetti when I want to upset Italians. Truth is it's pretty good

There's a kebab place near me that will throw you out if you put ketchup on your kebab or falafel lol

I don't like ketchup, myself, but when I make wings my daughter has me baste hers with ketchup.

i have so many spare sachets of ketchup from mcdonalds, and recently i've been experimenting with them to make a good sauce to mix into plain noodles. ketchup, sweet soy sauce, paprika, chili oil, chili flakes, toss in some random spices, and that's a good noodle sauce.

before finding that combination, i've gotten quite a few that were way less palatable.

my alternate answer is spaghetti, just to piss off the italians.

Pizza.

Not me, but my girlfriend's son (7) loves it on corn on the cob.

Roiskeläppä

Plain Rice and Spaghetti Ezine Cheese (Turkish white) sandwich