Mackerel fillets with mustard sauce recipe

Ingredients to make Mackerel fillets with mustard sauce:

• 6 mackerel serving
• 1 tablespoon of flour
• 1/2 liter of cold milk
• 20 grams of butter
• 1 tablespoon of fine oil
• 3 tablespoons dark mustard
• The juice of 1/2 lemon
• 1 tablespoon chopped parsley
• 40 grams of butter
• salted

How to make Mackerel Fillets with Mustard Sauce:

1. In the fishmonger they are ordered to be emptied, the head removed and cut into two fillets, removing the central spine from the mackerel.
2. They are washed afterwards and dried very well with a clean cloth.
3. They are placed in a besuguera so that the fillets do not ride on top of each other.
4. In a skillet, melt the butter with the oil.
5. Once melted
6. The flour is added.
7. Stir with a wooden spoon.
8. And then, little by little, add the cold milk while stirring.
9. Cook the béchamel for about 10 minutes and then add the mustard, off the heat, and the lemon juice.
10. It is tested for salt.
11. If necessary, it is rectified, but with mustard it is easy to have to salt very little.
12. This sauce is poured over the mackerel fillets.
13. Sprinkle the parsley and add the bits of butter.
14. Bake in a medium oven for 25 to 30 minutes.
15. They are then served at their source.