Brie Panggang Apel yang Dibungkus Kue

Bahan-bahan (6 porsi)

• 2 Honeycrisp apples, sliced
• 3 tablespoons salted butter
• 3 tablespoons maple syrup
• 1 sheet frozen puff pastry, thawed
• 1 wheel (8-12 ounce) brie
• 2 tablespoons apple butter or fig preserves
• 1 egg, beaten
• coarse sugar, for sprinkling
• fresh thyme, for serving