In separate pans (I used skillets), fry the diced pancetta until crispy, and cook the nuts until they've caramelized. To cook the nuts, add the butter, nuts, and sugar to a pan on medium heat, and stir frequently until the sugar has melted and they've slightly browned. Be careful as they can burn easily. Once the nuts are done, put them on a plate or a piece of parchment paper or foil and spread them out so they don't all stick together. Set the pancetta and nuts aside to cool for a few minutes.