Ingredients

1 large russet potato, peeled and grated (1 1/2 cups)

1 small leek, white and pale-green parts only, thinly sliced crosswise and rinsed well

3 tablespoons all-purpose flour

1 pinch of freshly grated nutmeg

Coarse salt and freshly ground pepper

Extra-virgin olive oil

1 cup watercress, trimmed

1/2 teaspoon fresh lemon juice

Preparation

Place potato in a bowl of cold water, and let soak for 10 minutes. Drain well in a salad spinner or squeeze in a clean kitchen towel to remove excess water. Combine potato, leek, flour, nutmeg, 3/4 teaspoon salt, and 1/4 teaspoon pepper.

Heat 2 tablespoons oil in a large nonstick skillet over medium heat. Scatter potato mixture in skillet, and press lightly with a spatula to make sure it holds together. Cook until underside is golden, about 6 minutes. Flip. Raise heat to medium-high. Cook until underside is golden, 4 to 5 minutes.

Turn out galette. Toss watercress with lemon juice and 1 1/2teaspoons oil, and place on top of galette. Slice into 8 wedges.