3 whole wheat cucumber muffin Recipes

lowfat plain greek yogurt, white wine vinegar, sugar, red onion, divided, ripe avocado, cut into 1-inch chunks, sliced cucumber, portobello cap, frozen shelled edamame, thawed, garlic, boneless, skinless chicken breasts (6 oz each), quartered, reduced-sodium soy sauce, cayenne pepper, olive oil, whole-wheat english muffins (or wholegrain buns), split, lettuce leaves (optional)