Zest and juice from 2 lemons 3 cloves garlic, minced 2 teaspoons Dijon mustard Salt and pepper 1/2 cup olive oil 1/2 cup sour cream 8 cups mixed salad greens
Make dressing: in a medium bowl, combine lemon zest and juice, garlic, mustard, and 1/4 teaspoon each salt and pepper. Slowly whisk in oil until thickened. Whisk in sour cream.
Toss together lettuce; transfer to serving platter. Pass dressing on the side.