We have a winner - but you are from Brazil so that gives you an advantage. These are indeed cuy which are apparently a delicacy in Ecuador. Most simple meals (chicken, rice, and salad) are around $3 but cuy was $17.
For those not familiar with cuy (as I was) - let me just say that those are particularly large guinea pigs.
In South Africa doing lots of boat stuff. Departure north from Cape Town around December 15th. Arrival in the Caribbean around the beginning of February, after 5300 miles or so.