Peel the mango, pineapple and apple and cut into cubes, mix.
Cut the garlic into wafer-thin slices and lard the fish fillet with it. Salt, pepper. Cover the fish fillet with rosemary needles and fry in a pan with olive oil so that the fillet has a brown crust on both sides and is well done on the inside.
Sear the fruit in a pan with butter and deglaze with the balsamic vinegar.