Sicilian Olive Salad(Insalata Di Olivi Schiacciati)  
["1 1/2 lb. green olives, pitted", "1 medium onion, sliced", "3 to 4 stalks celery", "salt and pepper to taste", "1/4 c. apple cider vinegar", "1/2 c. olive oil", "2 tsp. dried oregano"]
["Slice celery into pieces about 1/4-inch thick.", "Add olives, onion, salt, pepper, oregano, oil and vinegar.", "Mix well and allow to chill about 2 to 3 hours before serving."]
["green olives", "onion", "stalks celery", "salt", "apple cider vinegar", "olive oil", "oregano"]