Canadian Bacon & Scallion Mini Quiches

Preheat oven to 350°F. Coat 12 nonstick (1/2-cup) muffin cups with cooking spray (see Tip). Whisk eggs, egg whites and buttermilk (or milk) in a large bowl. Stir in scallions, cheese, bacon and 1/2 teaspoon pepper. Divide the egg mixture evenly among the prepared muffin cups. Bake until the eggs are cooked and beginning to brown on top, 25 to 28 minutes. Run a knife around edges to loosen the quiches from the cups. Meanwhile, whisk lemon juice, oil, mustard and pepper to taste in a large bowl. Add salad greens to the bowl; toss to coat with the dressing. To serve, divide the salad among 6 plates and top with tomato wedges and 2 quiches each.