Clean fish, wash, remove gills. Treat all with salt and pepper.
Put chopped lemon in chickpeas. Stab with toothpicks. Put the fish in the sleeve and fasten it tightly, make punctures in several places for the steam to exit.
Place the fish in a cold oven on a wire rack, turn on 180g., Bake for 40 minutes. We take out of the sleeve and remove the skin.