How to make
Debone the leg of lamb, put 6 carrots in it. Sprinkle it with salt and black pepper. Make a roll and tie it with a thread. Put it in a baking dish coated with butter and sprinkle it with spices.
Around it, place the chopped potatoes, the tomato cut into 2, the onion into 4 pieces. Sprinkle it with rosemary, oil, salt and water.
Wrap with foil and bake. Shortly before it's ready, remove the foil and bake until finished.