1/2 c Walnut oil 3 Cloves (medium) garlic; -peeled and crushed 1 c Bread cubes (1/2 inch) 1 pn Plus 1/8 ts Pepper 1 tb Red wine vinegar with 5 to -6% acidity 1 1/2 ts Rich chicken stock or canned -low-sodium broth 1 1/2 ts Dry white wine 4 sl Prosciutto (paper thin) 6 c Mild greens; loosely packed -(Bibb; Boston, or Red-leaf -lettuce)