These soufflé like pancakes originate in Scandinavia and are a traditional accompaniment to Gravalax. You can purchase Gravalx from the supermarket or you can prepare it for yourself simply by curing 1 side of salmon or trout or mackerel (boneless with skin on) it in crushed coriander seeds and peppercorns, maldon salt and dill, covered in foil and stored in the refrigerator for 1-2 days. Then wash off the curing mixture and brush it with Dijon mustard, a little honey and lemon juice, and sprinkle over plenty of dill, lemon or lime zest and a little shredded mint. The pancakes are also excellent instead of American pancakes with grilled bacon and maple syrups.