(It's in the Guide)
Boil your fresh water.
Put in one of each herb.
Tell a villager to cook by putting them on pot.
When they say "Unfinished", take them to berries (not to food bin). They will take berries and it will say "adding to stew".
Again put cook on pot, when it says "unfinished" take cook to knock down a fruit. That will get added.
And similarly get a fish.