Ingredients

3 shallots, finely chopped

1 teaspoon salt

1/4 teaspoon freshly ground pepper

2 anchovy fillets, roughly chopped (optional)

3 tablespoons walnut oil

1 tablespoon freshly squeezed lemon juice

Grated zest of 1 lemon

2 teaspoons tarragon vinegar

2 cups mixed fresh herbs, such as mint, tarragon, flat-leaf parsley, and basil leaves, packed

1/4 cup snipped chives

Preparation

Place the shallots in a mortar. Add the salt, and, using the pestle, pound until a paste forms. (If a mortar is unavailable, place the shallots on a cutting board, and sprinkle the salt over the top. Using the side of a chef’s knife, crush the shallots against the board. Continue crushing until a paste forms.) Add the pepper and the anchovies, if using. Work mixture, with either pestle or knife, until a paste forms again. Transfer the mixture to a medium bowl.

Using a small whisk or a fork, mix the oil, the lemon juice, the lemon zest, and the vinegar into the shallot paste.

Using a large chef’s knife, chop the herbs until medium-fine. Add herbs to the bowl with the shallot paste. Add the chives. Using a rubber spatula, gently combine ingredients. Serve sauce the same day.