First, peel the onion, finely slice it and rub the slices with freshly ground sea salt. Leave aside until the other steps are completed.
Steam the peeled carrots and potatoes for 25 minutes.
Grate the vegetables in separate bowls.
Prepare a sauce from the yogurt, the mustard, the onion and a pinch of salt and pepper.
Prepare 2 serving bowls and add the following layers:* a layer of beetroot* a layer of chunked smoked mackerel * a layer of yogurt sauce* a layer of potatoes* a layer of chunked smoked mackerel* a layer of yogurt sauce* the final layer - the carrots
Garnish the salad with capers and put to fridge until serving.
Notes
For this recipe, I purchased the beetroot already boiled so preparation time was reduced because of that.