I have found that vanilla mushroom stew is not affected by SpiceOfLife. I am using SpiceOfLife-1.7.10-1.2.3 in the EthoLP modpack, with default configurations. The stew is not recorded in the food journal, not affected by diminishing returns, and not pulled out of chests by a lunchbag (and I'm assuming lunch box).

By messing around in creative I found that it is the Natura mushroom stew that is the problem. Pulling vanilla minecraft stew from the creative menu works as intended with TSoL. Using a bowl and mushrooms to create the stew creates the Natura version which is then not tracked by TSoL. This might just be a compatibility issue between the mods.

Edit: Natura version 1.7.10-2.2.0.1

Not able to reproduce with just AppleCore + TSoL; everything works perfectly fine.

Perhaps some mod is overwriting mushroom stew?

I restarted the game and it resolved itself. The logs from the problematic run were cleared at that time, so if it happens again I will attach them to see if there was some error in loading.

Ah, that should be fixed, but it looks like Natura hasn't released a new version with the fix yet.

See: progwml6/Natura#207