Preheat oven to 350ºF (180ºC).
Line a baking sheet with aluminum paper. Reserve.
In a bowl, lightly beat 1 egg white with ¼ cup sugar and ¼ teaspoon salt until thick and foamy, about 1 minute with a fork or whisk.
Add 1 tablespoon smoked paprika.
Cayenne nuts: add between a Dash to ¼ teaspoon ground cayenne pepper and 1 teaspoon Worcestershire sauce.
Cinnamon nuts: add ½ teaspoon ground chili powder and ¼ teaspoon ground cinnamon.
Add 2 cups nuts of choice to the mixture, and stir until very well coated.
Spread on the prepared baking sheet, single layer if possible, and bake for 5 minutes.
Remove the pan, stir the nuts with a spatula being careful not to tear the paper, and return to the oven 10-15 more minutes, stirring once more before they're done.
Remove from the oven and immediately stir again so they don't stick while cooling down. Transfer to a clean baking sheet or pan (if it's non-stick even better) and check as they cool down and stir again if needed.
Let cool completely and store in airtight containers.