Set oven to 180C. Line a baking tray with baking paper. Butterfly or flatten the chicken breasts. Spread with honey and mustard. Place the thyme sprigs in the middle ofeach breast allowing some of the leaves to hang over one end. Roll up and secure with kitchen twine or toothpicks. Place on the baking tray, season with sea salt and pepper, and bake for 20 minutes, basting halfway through. Serves 2.