- 3 bunches large scallions, trimmed
- 2 tablespoons extra-virgin olive oil, divided
- 1 tablespoon white-wine vinegar
- 1 teaspoon grainy mustard
- 1/4 teaspoon sugar
- 1 hard-boiled large egg, peeled and chopped
- Prepare a gas grill for direct-heat cooking over medium heat; see Grilling Procedure .
- Toss scallions with 1 tablespoon oil and 1/4 teaspoon each of salt and pepper.
- Grill scallions, covered, turning occasionally, until wilted and tender, 6 to 8 minutes.
- Whisk together remaining tablespoon oil, vinegar, mustard, and sugar in a large bowl.
- Toss scallions with vinaigrette and season with salt and pepper. Serve warm or at room temperature, topped with egg.