Dab the fillet dry and cut into small cubes. Drain the pineapple. Cut half into small pieces as well. (The rest of the pineapple is extra for the raclette)
Halve the wooden skewers. Place the fillet cubes and pineapple pieces alternately on top of each other. Fry in a pan in hot oil or fry in a raclette pan while turning. Season with salt and pepper and gratinate in a pan with cheese