First of all, a good fresh fish is the best option to eat, no matter if it is for breakfast, lunch or dinner, and even more so if it is Tuna; Having said that, I think they made the right choice and being satisfied is the best, even if your wife doesn't really like the taste of fish and has to work a lot when preparing her traditional food. I had not seen sweet potatoes cooked like this directly on the fire so I imagine they had a delicious smoky flavor. It's great to enjoy that special and delicious lunch.