In a large pan, melt a knob of butter, add the spoon of meat extract diluted in water and Marsala and let the liquid simmer for a quarter of an hour.

Place the slices of ham in this sauce and cook over a very low heat for another 10 minutes.

In the meantime, prepare, using the remaining the butter, four fried eggs and then place an egg on each slice of ham; add salt and pepper.

Serve immediately, still hot.