Tricolor Salad with Oranges, Olives & Kefir Herb Vinaigrette

Kefir, a drinkable fermented dairy product, is rich in probiotics — even more so than its better-known cousin, yogurt. Plus, its tangy, tart flavor makes it a fantastic counterpoint in recipes like this herby dressing. Shallots and chives lend flavor while acting as prebiotics, or “food” for the healthy bacteria in your gut.