Peel the sweet potatoes and cook in boiling salted water for about 15-20 minutes, then cut into thin slices. Peel onion and garlic and chop finely. Peel, quarter and slice the carrots. Finely chop the parsley.
Fry the minced meat, then add the carrots, onions, garlic and tomato paste and season with salt and pepper. Whisk the eggs in a bowl and then add the cream.
Preheat the oven to 175 ° C.
Brush the baking dish with oil. Layer half of the potato slices in the casserole dish, distribute the minced meat over it and cover with the remaining potato slices. Pour the egg and cream mixture over it and sprinkle with parmesan.
Bake in a preheated oven at 175 ° C for about 25 minutes.