I was able to find the answer on this guide:
Since you don't want spoilers, here's the bit that's relevant to your question:
Chilies: Combine the chilies taken from the sailors with the spice
Extra virgin oil: Go back to the pier left of the plane. Use the
spice container on the oil tap.
Lemon: Enter the Charter office. Check the blue cup on the counter
to get lemon added in with the mix.
Chervil: Go up the ladder and check the books on the bookshelf.
Bwana finds chervil and adds it to the mix.
Salt: Go to the ship. Go right of the ship where the pelican and
the forklift is located. Get salt from the box left of the forklift. Bwana adds it to the mix.
Ginger: Enter the ship and climb the ladder to go to the yacht.