Can be prepared in 45 minutes or less.

Ingredients

　　a 1-to 2-inch length of fresh gingerroot

　　1-1/2 tablespoons rice vinegar (available at Asian markets and some supermarkets)

　　1/4 cup vegetable oil

　　a pinch of sugar

　　3 cups loosely packed watercress sprigs, rinsed and spun dry

　　1/4 pound (about a 4-inch length) daikon (Oriental white radish), peeled and sliced into paper-thin rounds

　　1/4 pound smoked salmon, sliced thin

　　Grate the gingerroot into a fine sieve set over a bowl, press on the pulp to extract 2 teaspoons of the juice, and discard the pulp. To the bowl add the vinegar, the oil, the sugar, and salt and pepper to taste and whisk the dressing until it is emulsified. Divide the watercress among 4 salad plates and arrange some of the daikon rounds down the center of each plate. Roll the salmon into 8 rosettes, arrange 2 rosettes on each plate, and drizzle the dressing over the salads.