Шаг 1
Gut the mackerel and rinse well. Make cuts on both sides of the fish.
Шаг 2
Insert basil leaves into the cuts on the fish. Salt and pepper the fish on both sides.
Шаг 3
Cut celery into 3 cm pieces, crush garlic cloves with the flat side of a knife. Place a piece of foil or parchment paper on a baking sheet.
Шаг 4
Make a "pillow" of celery, place a garlic clove. Place the mackerel on the celery, drizzle with oil.
Шаг 5
Seal the fish in a "packet". Bake at 220°C for 17-20 minutes.