A minor house rule from my Kaserne on the Borderlands campaign:

One of the PCs in this campaign has the Cook specialization. With the campaign centering on a farming village with adequate food production, the party hasn’t yet had to subsist on its own in the wilderness, so foraging and hunting are more supplements to the local food reserves. This makes Cook something less of a good investment.

The community currently has 71 residents (including PCs), so it burns through 71 rations of food a day under normal circumstances. The PC in question has assumed a discussed-but-not-seen-on-screen role as the village’s head chef. Up until now, it’s been solely a roleplaying factor, but we recently negotiated a means for giving it some mechanical effect.

Each day that the PC spends a shift supervising food production, the player makes a Survival check. Each success reduces the community’s total food consumption for that day by 5%. This represents increased efficiency in the communal kitchens – basically, the same effect as the specialization’s as-written function, but scaled up.