Peel, wash and slice the potatoes. Fry in 2 tablespoons of hot oil, turning occasionally for approx. 25 minutes
Sort the blueberries, wash and drain if necessary. Wash the rosemary and pluck the needles. Peel and finely chop the onion. Wash the steaks if necessary, dab dry and tie them with kitchen string
Heat 1-2 tablespoons of oil in a frying pan. Fry the steaks for about 3 minutes on each side. Season with salt and pepper and keep warm
Sauté the onion and rosemary in the frying fat. Stir in a good 1/8 l water, vinegar, maple syrup and 1/3 blueberries, bring to the boil. Simmer at high heat for 6-8 minutes. Heat the remaining berries briefly. Season sauce and potatoes with salt and pepper. Arrange everything. Fried mushrooms taste good with it
Drink: strong red wine