Mushroom, Celery And Pimento Salad
["1 lb. fresh mushrooms", "1 c. chopped tender stalks celery with the leaves", "2 canned pimientos or skinned red peppers, cut into strips", "2 Tbsp. minced chives or green onions", "salt to taste", "2 Tbsp. red wine vinegar", "6 Tbsp. salad oil", "1/4 tsp. freshly ground pepper", "1/2 tsp. dry mustard", "shredded lettuce or romaine", "watercress for garnish"]
["Wipe mushrooms clean of any dirt and slice caps and stems thinly into a bowl.", "Add celery, pimientos or red peppers and chives or onions."]
["fresh mushrooms", "tender stalks celery", "pimientos", "chives", "salt", "red wine vinegar", "salad oil", "freshly ground pepper", "dry mustard", "shredded lettuce"]