Every restaurant have their own signature sauce, seasoning, etc.. like in-n-out , shake shack, McDonald's and so on.. you can always ask the restaurant or just taste it while there or have it on the side. Mr Iqbal, this place sells the best burger in Lancaster and that's the special thing about this place. So yes this place is special at least for those who really value the real American burgers.
Don't know call the store they can help
Nothing special about a sauce , only thing special about this place is that they offer halal meat. Ok taste.
It's probably pickles, ketchup, and mayo - maybe some mustard - blended together.
I do not know. Try ketchup, mayo, cream cheese and cummin. I made that up
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