01 - Preheat oven to 400°F.
02 - Lay out four large sheets of heavy-duty aluminum foil, approximately 12x16 inches each.
03 - Place a chicken breast in the center of each foil sheet.
04 - Distribute sliced bell pepper, squash, zucchini, onion, and halved cherry tomatoes evenly around each chicken breast.
05 - Combine olive oil, Italian seasoning, garlic powder, paprika, salt, and black pepper in a small bowl. Drizzle the mixture evenly over the chicken and vegetables in each packet.
06 - Fold the foil sides up and over the chicken and vegetables, crimping edges to seal tightly while leaving slight room for steam circulation.
07 - Transfer packets to a baking sheet and bake for 25 to 30 minutes, until chicken is cooked through and vegetables are tender.
08 - Carefully open each packet watching for escaping steam. Garnish with fresh chopped parsley and serve with lemon wedges.