Mackerel has a wonderful flavour, perfect with the punchy flavours of the roasted roots and horseradish. A fish in plentiful supply, that is so good for us, so tasty, but sadly under used. Ask your fishmonger to fillet and pin bone the mackerel for you, this is then such an easy recipe to cook and a big fat tick in the box for increasing fish intake in the diet! This is the third and final recipe developed for the Diabetes, Obesity and Metabolic Syndrome module of my Diploma in Culinary Medicine. I’ve included the nutritional information at the bottom of the recipe if you’re interested to read why I selected and used certain ingredients.   Serves 2 1 large parsnip 1 sweet potato 2 large carrots olive oil 2tbsp fresh thyme, finely chopped salt and freshly ground black pepper 1tbsp natural Greek yogurt 1tsp grated hot horseradish 1tbsp fresh lemon juice 1 garlic clove, crushed 4 mackerel fillets chopped fresh chives to garnish, optional steamed green vegetables to accompany   Preheat the oven to 220ºC. Scrub the …