Boil the fillet in salted water until tender, cool and cut into cubes.
Boil the potatoes in their skins, cool, peel and cut into cubes.
To make the casserole even tastier, fry the potatoes and meat until golden brown in a pan.
Beat eggs with mayonnaise, salt and pepper to taste.
Transfer potatoes with meat to a baking dish. Pour the egg and place in a preheated oven to 180 degrees for 30 minutes.
Serve the casserole warm.
A quick casserole with potatoes and meat is very tender, tasty and satisfying, you do not need too much time to cook if you especially boil the potatoes and meat. You can use any meat in this casserole, you can also sprinkle grated cheese on top. You can also add any greens for aroma and brighter taste. Use your favorite spices as well, you can add a little spicy.