Wash parsley, shake dry and pluck the leaves from half of it. Wash the meat, dab dry, and if necessary tap flat. Place them side by side on a work surface. Season with salt and pepper. Cover each cutlet with two slices of ham and parsley leaves. Roll them up and fix them with wooden skewers
Heat the oil in a frying pan. Sauté the roulades in it vigorously while turning. Deglaze with stock, cream and sherry, bring to the boil, cover and stew for 1 1/4-1 1/2 hours.
Wash and peel the asparagus and cut off the woody ends. Put them on a fat pan and pour 750-1000 ml of boiling salted water with 1 teaspoon of sugar. Spread 25 butter in flakes over it. Cover firmly with aluminium foil. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes
Wash potatoes thoroughly and cook in boiling water for 20-25 minutes. Cut the remaining parsley into fine strips, except for a few leaves for garnishing. Remove roulades from the stew stock, keep warm. Bring the stock to the boil, stir in the sauce thickener, bring to the boil and simmer for 1 minute. Season sauce to taste with salt, pepper and sugar. Put the roulades back into the sauce
Froth 50 g butter in a small pot. Carefully lift the asparagus out of the asparagus water and let it drip off a little. Drain the potatoes, let them steam a little. Arrange a roulade, some sauce, asparagus and potatoes on plates, garnish with parsley. Sprinkle asparagus with butter and sprinkle with parsley