Middle Eastern–Inspired Mezze Plate

Name: Middle Eastern–Inspired Mezze Plate
Ingredients: 1/2 small red onion, thinly sliced; 1 10-ounce package couscous (1 1/2 cups); 2 cups frozen shelled edamame; 1 1/2 cups cherry tomatoes, halved; 1/4 cup chopped fresh parsley; 3 tablespoons extra-virgin olive oil; Juice of 1 lemon; Kosher salt and freshly ground pepper; 1 cup hummus, preferably roasted red pepper-flavored; 8 stuffed grape leaves (from the deli counter); 1/4 cup jarred Peppadew peppers, halved; 2 whole-wheat pitas, cut into wedges and toasted