Boil the egg hard for about 10 minutes. Quench, peel and let it cool down
Cook the pasta in plenty of boiling salted water for about 9 minutes until al dente. Quench, drain and let cool off
Mix crème fraîche, milk, horseradish, lemon peel and lemon juice until smooth. Fold in capers. Season with salt, pepper and 1 pinch of sugar
Clean, wash and possibly pluck the rocket. Cut trout fillets into bite-sized pieces. Chop egg coarsely
Mix the pasta and sauce. Carefully fold in the rocket, trout pieces and egg. Season to taste with salt and pepper. Garnish with lemon slices and caper apples
Drink: cool white wine