Endive-Watercress Salad
["1/4 c. olive oil", "3 Tbsp. white wine vinegar", "1 tsp. Dijon mustard", "1/2 tsp. salt", "1/4 tsp. freshly ground pepper", "3 heads Belgian endive", "2 bunches watercress, rinsed and torn", "1/2 c. walnuts, toasted"]
["Combine first 5 ingredients in a jar; cover tightly and shake vigorously.", "Rinse endive lightly; pat dry and trim ends.", "Arrange on salad plates; top with watercress.", "Drizzle dressing over top and sprinkle with toasted walnuts."]
["olive oil", "white wine vinegar", "mustard", "salt", "freshly ground pepper", "endive", "bunches", "walnuts"]