Ingredients

3 tablespoons white-wine vinegar

2 tablespoons Dijon mustard

2 tablespoons olive oil

1 minced shallot

1/4 cup loosely packed chopped fresh tarragon (or 1/2 teaspoon dried)

3/4 pound trimmed spinach

1/2 cup coarsely chopped toasted walnuts

4 quartered hard-cooked eggs

8 ounces thinly sliced mushrooms

Coarse salt and ground pepper

Preparation

In a large bowl, whisk together vinegar, Dijon mustard, olive oil, shallot, and tarragon.

Add spinach, walnuts, hard-cooked eggs, and mushrooms. Season with coarse salt and ground pepper. Toss just before serving.