Ingredients
1 pound russet potatoes (about 2), cut into 1-inch pieces
2 teaspoons extra-virgin olive oil
2 tablespoons red-wine vinegar
1 teaspoon Dijon mustard
1 hard-cooked large egg
1/2 small red onion, thinly sliced
Coarse salt and ground pepper
Preparation
Set a steamer basket in a saucepan with 1 inch simmering water. Add potatoes, cover, and steam until potatoes are tender, 15 to 18 minutes. Transfer potatoes to a medium bowl and add olive oil, vinegar, and mustard; toss to combine. Using the large holes on a box grater, grate egg into potatoes. Add onion, season with salt and pepper, and toss to combine.
