Built-In Relish Burgers
["1 1/2 lb. ground beef", "1 large onion, chopped", "2 Tbsp. salad oil", "2 Tbsp. mustard", "2 Tbsp. vinegar", "2 Tbsp. sugar", "1/2 c. catsup", "1/2 c. chili sauce", "1/2 c. pickle relish", "salt"]
["Brown meat and onion in salad oil until meat is crumbly.", "Pour off excess oil.", "Stir in remaining ingredients and simmer for 30 minutes.", "Serve on buttered toasted buns.", "Serves 10."]
["ground beef", "onion", "salad oil", "mustard", "vinegar", "sugar", "catsup", "chili sauce", "pickle relish", "salt"]