Ravenna-style stew with milk

Preparation:

Preparation: Place the meat in a pot and cover it with milk; add 2 small glasses of rum, the chopped herbs, 1 tablespoon of tomato sauce, salt. Marinate the meat for 5-6 hours; transfer to the heat and simmer for 5 hours. Still on a slow fire, move the meat into a saucepan with butter, sieved cooking liquid and spring onions, until the onions are cooked.