Cut the meat into cubes, sprinkle with salt and black pepper, put it in a bowl and pour the sunflower oil and the juice of 2 lemons. Allow to stand for 6 hours. Drain and each piece of meat is screwed in rasher. Skewers stringing meat, slice of lemon, a piece of corn, slices of halibut and so on until finished products. Bake in preheated BBQ, often turn.