In a large saucepan, heat the oil over medium heat and sauté the meat for 5 minutes.
Add the onion and garlic and fry until golden. Add the extract and fry for 2 minutes.
Pour in the tomato, water, salt, pepper and bay leaf. Cook for 10 minutes, stirring occasionally.
Remove from the heat and mix in the basil. Mix the mashed potatoes with the cream, salt, pepper and nutmeg.
Spread a layer of sauce on a medium baking dish and alternate layers of pasta, sauce, mozzarella cheese, and mashed potatoes, ending with the pasta and sauce.
Sprinkle with the Parmesan cheese and bake in a preheated oven for 40 minutes or until golden. Let it rest for 10 minutes before serving.
