To prepare, you will need:
fresh frozen mackerel,
mayonnaise, mustard, ketchup,
garlic,
onion
Spices for fish, salt, pepper,
vegetable oil.
Preparation:
Defrost the mackerel. Prepare a sauce of mayonnaise, mustard, ketchup, vegetable oil, spices and salt. Add chopped garlic and grated onion on a coarse grater. Mix well and coat the mackerel. Put in a cup and leave to marinate for 3-5 hours. I cook on the grill. It goes fast. The fish is very juicy.