Pasta Sauce
["2 Tbsp. olive oil", "2 Tbsp. butter", "1 medium onion, sliced", "1 to 2 stalks celery, chopped", "1 green pepper, sliced", "1/2 lb. fresh mushrooms, sliced", "3 large green olives, chopped", "1 (6 oz.) can tomato paste, with 2 c. water*", "2 Tbsp. parsley, snipped", "1/2 to 1 tsp. salt", "dash of pepper", "1 bay leaf", "1 tsp. dried oregano"]
["*Or, 1 (12 ounce) tomato sauce and 1 cup water or tomato paste and whole tomatoes and little water."]
["olive oil", "butter", "onion", "stalks celery", "green pepper", "fresh mushrooms", "green olives", "tomato paste", "parsley", "salt", "pepper", "bay leaf", "oregano"]