Step 2: Preheat the Oven!
First, we have to PREHEAT the OVEN to 250 degrees F (which is roughly 120 degrees C).
[I often forget to do this first, so when everything's ready to go in, I have to wait another twenty minutes because I'm an idiot.]
"But Jason, why such a low oven temperature? I want to eat these delicious crunchy almonds as soon as possible!"
Let me answer that for you using a combination of kitchen-science facts and making-stuff-up-based-on-assumed-facts:
Almonds are dense critters. Seriously, cut one in half and you'll see what I'm talking about. Also, there's a fair bit of water in them. So through a combination of trial-and-error and watching "Good Eats", cooking foods with a lot of water in them at a lower temperature for a longer amount of time gets rid of MORE water without comprimising the quality of the food. In this case, we don't want burnt almonds, we just want thoroughly roasted almonds.