Creating Walnut Twirls with Blue Cheese is simple if you follow these straightforward steps:

1. Preheat the Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Prepare the Filling: In a bowl, combine the finely chopped walnuts, crumbled blue cheese, chopped rosemary, olive oil, salt, and pepper. Mix well until all ingredients are evenly distributed.
3. Roll Out the Puff Pastry: On a floured surface, roll out the thawed puff pastry into a rectangle, about 1/8-inch thick.
4. Spread the Filling: Evenly spread the walnut and blue cheese mixture over the puff pastry, leaving a small border around the edges.
5. Roll the Pastry: Starting from one long side, carefully roll the pastry into a log. Make sure to roll tightly for a better shape.
6. Slice the Twirls: Using a sharp knife, slice the rolled pastry into 1-inch thick pieces. Each piece should reveal the filling inside.
7. Place on Baking Sheet: Arrange the sliced twirls on the prepared baking sheet, ensuring they are spaced apart.
8. Brush with Egg Wash: Brush the tops of each twirl with the beaten egg to give them a beautiful golden color when baked.
9. Bake: Place the baking sheet in the preheated oven and bake for 20-25 minutes, or until golden brown and puffed.
10. Cool Slightly: Once baked, remove the twirls from the oven and let them cool slightly before serving.

These clear steps will guide you through the process of making these delicious Walnut Twirls with Blue Cheese effortlessly.