I assume the strange item Vicky, at Restaurante Maná, showed me was a fruit. She said it came from Africa. She said you eat the seeds. They have a strange resemblance to cashews. Have you see them before?
I apologize for the quality of the photo of the seed, I was using my cell and must not have had a steady hand.
UPDATE: I must have misunderstood about eating the seeds as Wikipedia says they are toxic.