Modern Gefilte Fish Preparation time: 20 minutes Cooking time: 1 hour 20 minutes Serves: 6 6 plate-size mackerel (1.4kg) sea salt flakes and freshly-ground black pepper 6 sticks celery 4 carrots, sliced 1 parsnip, chopped 3 heads garlic, halved 1 bunch thyme, chopped 6 juniper berries, crushed 2 brown onions, finely diced 2 Tbsp extra…