How do I flavor popcorn with a minimal amount of fat? I have a popcorn machine that produces popcorn without using fat. It basically blows hot air over the kernels, and after 2 minutes they start popping.

You're not supposed to add any flavoring agent (salt, sugar, ...) in the machines as it's not made for that. So when I want to add flavor, I spray water onto the popcorn right after it has popped, and then scatter the flavoring agent. This works relatively well.

The downside: 


the popcorn can become damp (I solve this by leaving the machine on, which blows hot air over the popcorn)
you can waste some flavoring agent (not all of it sticks to the popcorn, some of it falls on the bottom of the bowl)


The upside:


no fat used, healthier and your fingers will be less "greasy"


Any other ideas how to flavor your popcorn using no fat or a minimal amount of fat?
Don't spray with water with a standard squirt bottle. Get an olive oil spritzer. It's pressurized, so you get an almost aerosol-fine mist, which prevents the kernels from getting soggy. It also adds flavor, in addition to the powdered seasonings you add with it. Or you could use an infused oil and skip the powdered seasoning altogether.