Ingredients

　　1 tablespoon white-wine vinegar

　　1 teaspoon coarse-grain Dijon mustard

　　1/2 teaspoon salt

　　1/4 teaspoon sugar

　　1/8 teaspoon black pepper

　　3 tablespoons extra-virgin olive oil

　　1/2 pound thinly sliced cabbage (4 cups)

　　1/4 pound Bibb lettuce (2 to 3 heads), leaves separated and torn if large

　　1/4 pound mushrooms, trimmed and thinly sliced (1 1/2 cups)

　　4 cups loosely packed fresh flat-leaf parsley leaves (from a 1/4-lb bunch)

　　1 tablespoon finely chopped fresh chives

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