Peel and wash the potatoes and boil them in salted water for 20 minutes. Wash the lemon, dab dry and grate the peel. Halve the lemon and squeeze the juice. Wash parsley, dab dry and chop finely, except for a little bit for garnishing.
Wash the trout and dab dry with kitchen paper. Sprinkle with lemon juice inside and out and salt. Whisk eggs. Trout only in flour, d
Heat the oil in a large pan and fry the trout in it over a low heat for five to seven minutes on each side. Remove and keep warm. Drain the cooking fat. Melt the butter in the pan.
Add lemon zest. Drain the potatoes and sprinkle with parsley. Arrange on plates together with the trout. Garnish with parsley, dill and lemon. Add lemon butter extra.