If you cook gluten free, almond flour is an ingredient that comes in handy. If you are not gluten free. it is still a great way to add fiber and nutrients to your diet.
You can use it for baking and for breading.

It can be quite expensive to buy at the store.
However, it is very simple to make.

This works great if you have a spice grinder. But, a food processor or a blender that can grind nuts will also work.
You also need a fine mesh sieve(strainer) and bowl.

Ingredients:

Plain, whole almonds

Add a small handful of almonds to your spice grinder.
Pulse off and on for a minute.
Check and if it is mostly powdered, stop.
Put the sieve over a bowl and dump in the ground almond.
With clean hands or a spoon, press the flour through it into the bowl.
You may have larger pieces of almond left.
Put them back into the grinder and pulse until fine and again press through strainer.
Repeat with more almonds until you have as much as you want.

Be careful not to grind for too long or you will get almond butter.

To keep fresh, store in the refrigerator.