By the time you get to Sentinel Hill, you've thought up a more stable, less ethereal kind of food. It's still bread, but it's more substantive bread, and you can serve it at the scale the Hill demands. In fact, it's so effective that the murderer personally approaches you, confessing to having committed that crime, with the sole purpose of that confession being to help an attempt to hire you as a conjurer.
Hey, it's a job. Maybe you can make something great out of it. Report the murderer to the local authorities. Finish both sides of the equation.