2 tablespoons finely chopped shallots
2 tablespoons red- or white-wine vinegar
1/4 teaspoon fine sea salt, or to taste
2 teaspoons Dijon mustard
4 to 6 tablespoons extra-virgin olive oil
Freshly ground black pepper to taste
In a small bowl, whisk together the shallots, vinegar, and 1/4 teaspoon fine sea salt; let the mixture stand 10 minutes. Whisk in the mustard, then add the oil in a very slow, thin, steady stream, whisking constantly until the dressing is emulsified. Season with fine sea salt and freshly ground black pepper. DO AHEAD: The vinaigrette can be prepared ahead and refrigerated, in an airtight container, up to 1 week.
This classic dressing is delicious as is, but it's also a perfect template for further embellishments. For ideas on what to add—as well as more recipes and tips—see our Homemade Salad Dressing Primer.
YIELD: Makes about 1/2 cup ACTIVE TIME: 5 minutes TOTAL TIME: 15 minutes