Procedure
- Take foil and put some butter in the bottom of what is going to be the treasure chest.
- Cut the fish into cubes and put the pieces on the butter, add some sliced vegetables, then sprinkle with salt and black pepper. Top it all with a new piece of butter.
- Pack a loose aluminum bag and put it on the grill, over an open fire or in the oven (180 degrees) and cook for approx. 10 minutes.