Preheat Oven
Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
Prepare the Topping
In a small pan, heat olive oil over medium heat. Add minced garlic and rosemary. Sauté for 1–2 minutes until fragrant, then remove from heat.
Wrap the Cheese
Place the Gruyère in the center of the puff pastry sheet. Spoon the garlic-rosemary mixture on top of the cheese.
Seal the Pastry
Fold the pastry corners up and over the cheese, pinching to seal. Trim excess dough if needed and press to secure. Flip the wrapped cheese so the seam is on the bottom. Brush with egg wash for a golden finish.
Bake Until Golden
Transfer to the prepared baking sheet and bake for 20–25 minutes, or until the pastry is golden brown and puffed.
Serve Warm
Let rest for 5 minutes. Optionally drizzle with honey and serve with crackers or sliced bread.