Mushroom Medley

Halve portabellas and cut into 1/4-inch-thick slices. Cut crimini into 1/8-inch-thick slices and slice fresh shiitakes. Chop shallots, onions, garlic and leeks.

In a 12-inch heavy skillet, cook half of shallot mixture in half of butter over moderate heat, stirring, 1 minute. Add portabellas and salt and pepper to taste and cook, stirring occasionally, until mushroom liquid is evaporated, about 15 minutes. Transfer portabellas to a bowl and keep warm, covered.

Cook remaining shallot mixture in remaining butter over moderate heat, stirring, 1 minute. Add crimini and shiitake, salt and pepper and cook, stirring occasionally, until mushroom liquid is evaporated, about 10 minutes. Add to portabellas and keep warm, covered. Mushrooms may be prepared up to this point 1 day ahead and chilled, covered.

Diagonally cut scallions into thin slices. In a bowl, whisk together vinegar, soy sauce, and sugar. Heat mushrooms over moderately high heat until hot and add vinegar mixture. Boil mixture 3 minutes, or until liquid is reduced slightly, and stir in scallions.