Mackerel is a healthy fish that contains lots of good oils including omega 3 fatty acids.
It barely needs anything added to it (especially if it is pre-seasoned). A bit of seasoning: some salt, pepper, chilli sprinkled over it.
I have got into a routine of adding vinegar to the mackerel before heating in the oven at 180 degrees for about 10-15 minutes.
Vinegar is supposed to break down the fats and I find it also brings out a great flavour. Generously pour regular vinegar over the mackerel before putting into the oven.
I also chopped some carrots and parsnips together with some broccoli. Poured over some olive oil, added some salt and pepper and popped in the oven for about 30 minutes to bring out the flavour of the veg.
Some people were a bit sceptical of grilling broccoli, but it frays the “leaves” and finishes them with a nice crispy taste (almost like seaweed in Chinese restaurants).
The final meal is lean and healthy for a small lunch/dinner main meal. I recommend having this with the broccoli soup to start and it allows you to use up the stalk of the broccoli too!