1. Precook the pasta for 2 minutes in boiling water. Meanwhile, slice the onion and chop the steaks.
2. Brown the onion in olive oil, add the herbs de Provence, then the meat. Cook until browned, then mix the meat, heavy cream, and Provençal sauce.
3. Pour milk into a dish and place a lasagna sheet on top, followed by a layer of meat sauce. Repeat the process until finished.
4. On top of the last layer, spread Provençal sauce, add a knob of butter, and sprinkle with grated gruyère cheese.
5. Bake in the oven at 200°C for 20 minutes.