Wash the redfish fillets and dab dry. Sprinkle with 2 tablespoons of lemon juice, season with salt and cover and let stand for 10 minutes. Wash the apple, dab dry and cut in half. Cut off some slices to garnish and sprinkle with some lemon juice. Core the rest of the apple and cut into fine sticks. Bring apple pegs and apple juice to the boil in a pot and steam for about 1 minute.
Add mustard-cream sauce and warm up. Roast the mustard seeds in a pan without fat and remove. Heat 1 tablespoon of fat in the pan, add sugar and remaining lemon juice and steam the apple slices for 1-2 minutes. Remove and put aside. Whisk egg, some salt and pepper on a deep plate. Put flour and breadcrumbs on plates as well and turn the drained fish fillets first in flour, then in egg and finally in breadcrumbs. Heat the remaining fat in a frying pan and fry the fish fillets for 3-4 minutes on each side. Wash the chives, dab dry and cut into small rolls. Arrange the fish on a small plate and pour some mustard sauce over it. Sprinkle with chives and roasted mustard seeds. Serve garnished with apple slices, parsley and lime wedges.
Put flour and breadcrumbs on plates as well and turn the drained fish fillets first in flour, then in egg and finally in breadcrumbs. Heat the remaining fat in a frying pan and fry the fish fillets for 3-4 minutes on each side. Wash the chives, dab dry and cut into small rolls. Arrange the fish on a small plate and pour some mustard sauce over it. Sprinkle with chives and roasted mustard seeds. Serve garnished with apple slices, parsley and lime wedges. Add the rest of the sauce extra. Serve with rice or baguette