Preheat your oven to 150°C (302°F) with the fan on. Alternatively, you can use an air fryer (lined with an air fryer liner or using a heat-safe dish that fits into your air fryer). Keep in mind to stir the almonds once or twice during both roasting rounds if you make them in the air fryer.
Roast round one: Spread the almonds in a single layer on a baking sheet lined with baking paper. Bake for 5 minutes.
Roast round two: 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 star and namesake here, but soy sauce works too! If using soy sauce, add a pinch of salt since it’s a bit less salty than Tamari. Also, keep in mind that Tamari is gluten-free, while soy sauce is not.