Mushroom, Walnut, and Spinach Salad with Mustard Vinaigrette

It’s interesting that many Mediterranean countries pair mushrooms and nuts. In Italy, hazelnuts are the complement for assorted mushrooms. In Spain, almonds are often part of the duet. In this Greek-inspired salad, walnuts are combined with spinach in a spicy mustard vinaigrette. This is very nice served with tiropetes, the classic cheese-filled phyllo pastry.