Preheat your oven to 350 degrees F.

Whisk granulated sugar, cinnamon, salt, cardamom, nutmeg, and cayenne pepper in a small bowl until spices are well blended. Set aside.

In a separate large bowl, beat or whisk egg white with maple syrup until the liquid is bubbly and frothy.

Add pecans, cashews and almonds to egg white mixture. Stir well, to fully coat the nuts with egg white/maple syrup mixture.

Once the nuts are coated, add the spice mixture, and stir well, to fully coat the nuts with the spices. Line a large rimmed baking sheet with a layer of parchment paper.

Pour the coated nut mixture out onto a parchment paper-lined large baking sheet. Spread them out so that they are in a single layer, and separate them from each other as much as possible. Place in oven and bake for 25-30 minutes, stirring every 10 minutes (then re-spread them out), so the nuts and sugar won't burn. When they are done in 25-30 minutes, they will be dark brown, and almost all of the liquid will have dried onto the nuts. Remove from oven, and spread the nuts out on a clean piece of parchment paper or aluminum foil to let them continue drying (and are not sticky). Store the nuts at room temperature in an airtight container. Enjoy!