On the prepared baking sheet, mix the chopped pecans, pumpkin seeds, maple syrup, cayenne, and cinnamon. Spread everything out evenly in a single layer. Arrange the prosciutto slices flat around the nut mixture. Place the sheet in the oven and bake for 10 minutes, or until the nuts are golden and the prosciutto turns crispy. Keep a close eye on them to prevent burning. Once done, sprinkle the nuts with sea salt.