First fry the minced meat, onions, mushrooms, carrots and bay leaf in hot oil for approx. 8-10 minutes. Add the flour and tomato puree and roast for approx. 2 minutes. Pour in the bouillon and bring everything to a boil. Cover and let cook lightly for approx. 25 minutes.
In the meantime, cook the potatoes and prepare a mashed potatoes with butter, milk and salt.
Preheat the oven to 200 ° C top / bottom heat.
Remove the bay leaf and season the meat with salt and pepper. Put the meat and vegetable mixture in a prepared casserole dish (content approx. 1.7 liters) and cover with the mashed potatoes. Sprinkle with cheese.