See the ebooks
Prep8 min
Cook27 min
Total35 min
Servings2
DifficultyEasy
Macros per serving (1 steak per person)
490kcal
30 gprotein
9 gcarbs
36 gfat
3 gfiber

Of which 6.6 g sugars and 6.6 g saturated fat.

Values are for the first option listed in the ingredients; substitutions and variations change them. Carbs exclude fiber; energy uses the EU conversion factors (fiber at 2 kcal/g). Source for sugars and saturated fat: Portuguese Food Composition Database (Base de Dados da Composição de Alimentos), Instituto Nacional de Saúde Doutor Ricardo Jorge, I. P. — INSA, v 7.1 - 2026.

Quantities and times are a starting point: adjust them to your taste. Two things don't change: poultry and ground meat must be cooked all the way through, and allergens — always check the labels.

Highlights 30.4 g protein per serving · Vitamin C (tomato) · Unsaturated fat (olive oil)

Allergens fish

Roasted mackerel with tomato and onion

An oily fish rich in omega-3, roasted Mediterranean-style.

Rico's note: Ask your fishmonger to remove the larger bones from the mackerel — it saves time at the table and makes it easier to eat.

Ingredients

  • 2 mackerel steaks or fillets (300 g / 10½ oz)
  • 2 medium tomatoes, sliced into rounds, or 1 cup cherry tomatoes (200 g / 7 oz)
  • 1 medium onion, thinly sliced (150 g / 5½ oz)
  • 2 cloves garlic, minced (6 g)
  • 3 tbsp extra-virgin olive oil (30 g / 1 oz)
  • 1 tsp dried herbs (oregano, thyme or rosemary) (1 g)
  • ½ lemon (juice only, optional) (15 g / ½ oz)
  • sea salt and black pepper, to taste

Method

  1. Preheat the oven to 180 °C (350 °F). Rinse the mackerel and pat it very dry. Arrange the tomato slices and onion in a baking dish and lay the mackerel on top.
  2. Drizzle everything with the olive oil, add the minced garlic and sprinkle with the dried herbs. Season generously with salt and pepper. Squeeze the lemon juice over, if using.
Continues in the ebook

The full method (4 steps), Rico's tip, the variations and storage are in the ebook “Muscle Gain”. The English edition is coming soon.