For things other than making whipped cream or inhaling N[sub]2[/sub]O?
I have one made by iSi. I’ve made chocolate mousse a few times. The gelatin-stabilized peach foam over sparkling wine was a hit. And I’ve performed one rapid infusion of cucumber into gin. Anything else that I should try?
I’ve used them for lots of things. At a fine dining restaurant, we often served foam shooters as a amuse bouche. You can foam just about any pureed soup. We often did truffled-spring pea, white asparagus, and lobster-porcini foams. Another thing we did was make a horseradish foam to garnish mashed potatoes. I think we also did a wasabi foam for seared tuna.
Are those things particularly tricky to use? We watch *Chopped *fairly often, and it seems like any time a chef tries to use the thing, it goes poorly - either the charge goes FFFTTT! in a moment, or the thing dispenses splatters of glop rather than a nice foam.
The only times I’ve had problems are when I let some fruit chunks get in, which clogged the nozzle, and when I’ve been playing around with recipes and accidentally solidified my solution in the bottom of the bottle.