Grilled Peach and Bacon Salad with Buttermilk Vinaigrette

Name: Grilled Peach and Bacon Salad with Buttermilk Vinaigrette
Ingredients: 1 cup yogurt; ¼ cup sour cream; 3 tablespoons rice wine vinegar; 2 tablespoons apple juice; 2 yellow onions, sliced into ½-inch rounds; 10 cups trimmed arugula; 6 pieces apple wood smoked bacon, cooked and cut into 1-inch pieces; ½ cup buttermilk; 3 peaches, pitted and each cut into 6 wedges; Kosher salt and freshly ground pepper; 2 cloves garlic, minced