Wash and halve the potatoes. Wash chillies, cut lengthwise, remove seeds and cut into half rings. Mix the potatoes, 4-5 tablespoons of oil, chilli and cumin and place on a baking tray.
Season with coarse salt and pepper. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 25 minutes. Wash the meat, dab dry and season with salt. Brush the grill pan with oil.
Heat the pan to high temperature. Grill the meat on both sides for about 5 minutes. Take out. Dice bacon. Turn potatoes and sprinkle with bacon. Add the steaks to the potatoes and cook at the same temperature for another 12 minutes medium rare.
Wash the chives and parsley and dab dry. Pluck the parsley leaves from the stalks and cut them finely. Cut the chives into fine rolls, except for a little bit for garnishing. Mix sour cream, 2 tablespoons of oil and herbs.
Season to taste with salt, pepper and sugar. Arrange potatoes and herb sour cream on plates. Season meat with pepper, cut into slices and add. Garnish with chives.