Four-Onion Gratin

Recipe adapted from Bon Appetit. Leeks, shallots, onions and garlic combine to make a delicious side dish. 1/4 cup ( 1/2 stick) butter 6 leeks (white and pale green parts only), sliced 2 large onions, cut into eighths 8 shallots, halved 2 garlic cloves, minced 11/2 10-ounce bags frozen baby onions, thawed, drained 2 cups … Continue Reading →