Wash the fish, add salt and sprinkled with lemon juice. Dill is cleaned, cut and together with peeled and sliced ​​onions put in a bowl where previously poured olive oil. Capped and held for 4 minutes at 600 W, and the medium is stirred. Add mackerel, capped and held for 4 minutes at 600 Deut. Allow to stand for 3 minutes. Garnish with a sprig of dill and served with potato salad.