Hmm . . . Fishing?
Drying and smoking are two of the many excellent ways to slow the process of bacteria that spoils food.
I seriously considered making dried and pickled food. Knowing that I have preserved food that would last me for a lot of days to come would make me feel secure.
"Drying removes the water that is vital for the bacteria's reproduction and survival, and smoking has chemicals that slow bacterial growth. Sunlight and fermentation would transform the fats into an extremely energy-dense substance. They're an excellent way to preserve food," agreed Athena.
"Then, I'll leave it to you to tell Daedalus about constructing a smokehouse. Just a small one would do."
"What will you be doing, my lord?"
"I'll go to the river and see if I can catch a fish to roast and smoke."