Gruyère Panggang dalam Kue dengan Rosemary dan Bawang Putih

Bahan-bahan (8 porsi)

• 1 sheet frozen puff pastry, thawed
• 1 pound gruyere, fontina, or a mix, cubed
• 1 tablespoon chopped fresh rosemary
• 1 -2 cloves garlic, grated
• 2 teaspoons honey, plus more for serving
• 1 egg, beaten
• coarse sugar, for sprinkling