Good Old Fry Sauce

“You are an atrocious person! Since the day I met you I have become steadily more depraved.” –Georgette Heyer

Fry sauce is so yummy and so easy.  Here’s the recipe:
1/3 c. ketchup (or you can substitute BBQ sauce)
2/3 c. mayonnaise
Optional: 1 tsp mustard (just for a little added zip)