This is clever! It had never occured to me to use pineapple as a cooking tool. I should definitely try this the next time I have access to a grill.
Kristen of the food blog Make the Best of Everything sliced the bark off a pineapple, then bound it with twine around slices of mahi mahi. It takes a bit longer to cook than directly over the grill. But I suspect that it's worth it to infuse the fish with pineapple juice.
-via Messy Nessy Chic