Preheat the combi oven and set on a combi mode 200°C, 50% humidity, 7 minutes. Place the vision pan with bacon into the preheated combi oven. When done, remove the bacon and put peeled and sliced red onion into the same vision pan and set the timer for 5 minutes. When finished, remove the onion and put seasoned and sliced calves liver with leaves of sage into the the same vision pan with addition of olive oil and set the timer for minutes. When done, romove the liver and sage, place on a plate, top with red onion, bacon and sage. Serve with slice of bread or mash potato.