Ketchup is for steak.
My hot dogs feature mustard and mayonnaise. Although I’ve also used curry sauce, blue cheese dressing, greek dressing with cucumbers and feta, grape jelly, port-wine cheese spread, and… some other things.
I was going to grill some hot dogs the other night, but I set my grill on fire, instead. I hope it still works. I was able to save the grill pan with the veggies, but they were thoroughly be-sooted. The bacon-wrapped cream-cheese-stuffed jalapeno pepper which might have triggered the conflagration was both saved and delicious.