Spanish Hamburgers
["1/2 c. celery", "2 chopped onions", "2 Tbsp. butter", "1 lb. ground beef", "2 Tbsp. vinegar", "2 Tbsp. lemon juice", "2 Tbsp. brown sugar", "1 1/2 Tbsp. mustard", "1 tsp. salt", "1 1/2 tsp. pepper", "1 c. catsup", "1 c. water"]
["Brown celery, onions and ground beef in butter.", "Add vinegar, lemon juice, brown sugar, mustard, salt, pepper catsup and water. Simmer for 30 minutes."]
["celery", "onions", "butter", "ground beef", "vinegar", "lemon juice", "brown sugar", "mustard", "salt", "pepper", "catsup", "water"]