.  * * *  0 SERVINGS   EQUIPMENT: A 0-QUART PASTA POT FITTED WITH A COLANDER.  0 small spring onions or scallions, white part only, trimmed, peeled, and cut into thin rings  0 tablespoons Capers in Vinegar (see Capers in Vinegar), drained  0 plump, moist garlic cloves, peeled, halved, green germ removed, and minced  ¼ cup f