Courtesy of www.BONAPPETIT.com
1 small shallot, finely chopped
¾ cup olive oil
¼ cup Champagne vinegar or white wine vinegar
3 tablespoons fresh lemon juice
2 tablespoons fresh orange juice
¼ teaspoon finely grated lemon zest
Kosher salt and freshly ground black pepper
Combine first 6 ingredients in a small jar; season vinaigrette to taste with salt and pepper. Shake to blend.
Vinaigrette can be made 1 week ahead. Cover and chill. Shake before using.