Nyc Hot Dog Relish Ingredients : 1/2 cup Water 1 med onion, chopped 1/3 cup Ketchup 4 tbl Cider vinegar 1 tsp Coleman's dry mustard 1 tsp Paprika Freshly ground pepper Method : In saucepan combine all ingredients. Bring to boil. reduce heat; simmer 5 to 10 minutes, until desired consistency.