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It's curious, I do not see you using ketchup or other sauce, but it's okay I like mayonnaise too, There are cheese sauces, or BBQ

Well I also use Frank's red hot, and Rufus Teague BBQ Cause. Red pepper Jelly, Dijon Mustard.
Sometimes i dunk the bread in bacon fat or butter etc.

Mayo is a staple that's all ;)