Preheat oven to 325 degrees F / 163 degrees C.
Mix 1 egg white and 2 tablespoons maple syrup in large bowl, then whisk until frothy.
1 egg white, 2 tablespoons maple syrup
Add 2 cups pecans, ½ cup almonds, and ½ cup walnuts to bowl and toss until evenly coated.
2 cups pecans, ½ cup almonds, ½ cup walnuts
Combine ½ tablespoon cardamom, ½ teaspoon nutmeg, 1½ teaspoons cinnamon, ½ teaspoon cayenne pepper, 1 teaspoon salt, and ½ cup erythritol in another bowl.
½ tablespoon cardamom, ½ teaspoon nutmeg, 1½ teaspoons cinnamon, ½ teaspoon cayenne pepper, 1 teaspoon salt, ½ cup erythritol
Add spice mixture to nuts and stir until fully coated with spices.
Spread nuts on prepared baking sheet covered with parchment paper.
Bake for 20 minutes or until nuts are lightly golden.
Remove roasted nuts from oven and let cool completely before serving.