Nectarine Salad with Prosciutto

1 lime
4 large nectarines, pitted and thinly sliced
2 T. olive oil
1 t. honey
¼ t. salt
1/8 t. pepper
6 slices prosciutto (1/4 lb)
1 bunch watercress, tough stems discarded
1 T. coarsely chopped pistachios

From lime, grate ½ t. peel and squeeze 2 T. juice. In bowl, stir together nectarines, oil, honey, salt, pepper, lime juice, and ¼ t. lime peel. Let stand 10 minutes to blend flavors.

To serve, arrange prosciutto, nectarine mixture, and watercress on a platter. Sprinkly with pistachios and leftover peel.