Balsamic Chicken with Red Onions and Potatoes

Ingredients (9)

• + 2 tablespoons olive oil, divided, or more to taste add to pantry
• + 3 red potatoes, sliced 1/4-inch thick add to pantry
• ✓ ¼ cup minced fresh parsley
• ✓ 3 cloves garlic, minced
• + 2 whole split chicken breasts with skin add to pantry
• + kosher salt and ground black pepper to taste add to pantry
• + kosher salt and ground black pepper to taste add to pantry
• + 1 large red onion, cut into wedges add to pantry
• + 3 tablespoons balsamic vinegar add to pantry