Despite its name, Chris Hastings’s go-to dressing is not actually a vinaigrette in the strictest sense. Its pucker relies on lemon juice emulsified with Dijon mustard and olive oil; shallots and fresh herbs add earthiness and depth. But don’t limit this versatile blend to salads alone—it doubles as a marinade for fish and a grilling sauce for vegetables. “The variations are endless,” Hastings says.