In a saucepan over medium heat, add the Pears, Ground Ginger, White Wine, Butter, Sugar and Lemon, stirring to mix well. Cook for about 10 - 12 minutes or until the Pears are softened. Set aside and allow to cool.
While the Pear Compote is cooling, you can toast the Walnuts. In a skillet over medium heat add the Butter and heat until melted. Add in the Walnuts, stirring occasionally and cook for 3 - 5 minutes. Set aside to cool.
Preheat the oven to 400°F . Line a baking sheet with parchment paper.
On a lightly floured surface, roll out the Puff Pastry sheet until it is approximately 16 x 16 and about 1/8 inch thick. Any excess can be trimmed if needed.
Wrap 6 - 8 slices of Prosciutto around the entire wheel of Gouda (it doesn't have to be perfect, just cover the Gouda on all sides).
Lay the rolled out Puff Pastry on the parchment lined baking sheet.
Place the Prosciutto wrapped Gouda in the center of the rolled out Puff Pastry sheet, and starting with one corner at a time drape pastry over the Gouda until you have enclosed it.
Using a pastry brush, lightly brush the whisked Egg Wash over the Puff Pastry.
Bake in the center of a preheated 400°F oven for 35 - 45 minutes or until the pastry is golden and puffed.