Dijon Scallion Lamb Chops with Parmesan, Watercress and Pickled Onion Salad

Servings: 4 1 red onion peeled and sliced thinly ½ quart rice wine vinegar 1 clove garlic (chopped) drizzle of olive oil Salt and pepper to season 1 bunch scallions- with roots removed, washed and patted dry 1 cup Dijon mustard 2 racks of lamb (preferably American) ½ cup plus…