Iroh, experto en té

Food is an artifact type. Even though it appears on some creatures, it's never a creature type.

If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Tough Cookie (an Artifact Creature — Food Golem) to activate Bosco, Just a Bear's ability (an ability with "Sacrifice a Food" in its cost). You can't sacrifice a Food to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate Bosco, Just a Bear's ability.

If an opponent leaves the game, all permanents you gave to them will return to your control.

If either the opponent or the permanent you control becomes an illegal target by the time Iroh's second ability resolves, the ability does nothing and you cannot choose to have the opponent gain control of the permanent.

If you leave the game, all permanents you own leave the game with you.

Some spells and abilities that create Food tokens may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't create any Food tokens.

Whatever you do, don't eat the delicious cards.

You will choose targets for Iroh's second ability at the beginning of every combat, even if you aren't feeling generous. The decision to have the opponent gain control of the permanent isn't made until the ability resolves.