Oysters with Pickled Shallot

Put the shallot, vinegar, and sugar in a small saucepan. Bring to a boil and cook 5 minutes. Remove and cool. Transfer to a small bowl for serving. Open the oysters, loosen the muscles from the hinges. Arrange the oysters on the half shell on a platter and serve immediately, passing the pickled shallot for those who want it. A few lemon wedges for those who prefer oysters plain is a nice thought, too.