Let go of lettuce, and move on to curly endive or watercress sprigs to garnish these sumptuous shells.
Serve these jumbo shells either cold or warm. To serve warm, place shells on a microwavable platter. Cover with plastic wrap, folding back one edge to vent steam. Microwave on High 2 to 3 minutes or until warm. Serve with heated vinaigrette, if desired.