Read the recipe as described in the first hint if you don't know it is.
You need a broken egg shell, cooked spaghetti, and horn ashes.
The broken shell comes from a hatching animal.
Use the boa-boa shell -- the "Read this!" hints in the TOWN section tells you how to do that. The broken shell will be on the floor.
You can find the spaghetti in the store. And there's equipment to boil it.