Pork Chops with Escarole and Balsamic Onions

INGREDIENTS

• 2 tablespoons olive oil
• 4 6-ounce boneless pork chops (1 inch thick)
• Kosher salt and black pepper
• 1 small red onion, cut into 1/4-inch-thick rings
• 1/4 cup balsamic vinegar
• 1 head escarole, torn into large pieces