1 pound fresh asparagus, trimmed and cut into 2-inch pieces
2 cups sliced radishes
6 green onions, sliced
2 tablespoons chopped fresh chives
2 tablespoons chopped fresh parsley
3/4 cup olive oil
1/4 cup champagne vinegar or white vinegar
1 tablespoon Dijon mustard
1/2 teaspoon salt
1/4 teaspoon coarsely ground pepper
Place potatoes in a large saucepan; add water to cover. Bring to a boil. Reduce heat; cook, uncovered, 10-15 minutes or until tender. Remove potatoes with a slotted spoon; cool. Return water to a boil. Add asparagus; cook, uncovered, 2-3 minutes or just until crisp-tender. Remove asparagus and immediately drop into ice water. Drain and pat dry.
Transfer potatoes and asparagus to a large bowl; add radishes, green onions and herbs. In a small bowl, whisk vinaigrette ingredients until blended. Pour over potato mixture; toss gently to coat. Serve at room temperature or chilled. Stir before serving.