Preheat your oven to 150°C (302°F) with the fan on. Alternatively, you can use an airfryer.
Spread the almonds in a single layer on a baking sheet lined with baking paper. Bake for 5 minutes.
Remove the almonds from the oven and toss them with the Tamari and oil right on the baking sheet. Bake for an additional 10 minutes.
Remove the almonds from the oven and immediately toss them with the chili powder (while they're still hot).
Let the almonds cool completely for maximum crunch. Enjoy!
Notes
*Tamari is the superstar here, but soy sauce can join the party too! If you use soy sauce, just add a pinch of salt since it's not quite as salty as Tamari. Heads up: Tamari is gluten-free, while soy sauce is not.