Classic Bolognese Sauce

Ingredients:
1 oz. [2 tablespoons] butter
2 oz. lean ham, chopped
1 small onion, chopped
1/2 carrot, scraped and chopped
1 celery stalk, trimmed and chopped
4 oz. lean minced [ground] beef
2 oz. chicken livers, chopped
8 oz. canned peeled tomatoes, drained
2 tablespoons tomato puree
3 fl. oz. [3/8 cup] dry white wine
6 fl. oz. [3/4 cup] chicken stock
1/2 teaspoon dried basil
1/2 teaspoon salt
1/4 teaspoon black pepper

Direction:
In a large saucepan, melt the butter over moderate heat.
When the foam subsides, add the ham, onion, carrot and celery.
Cook, stirring occasionally, for 8 to 10 minutes
or until the onion is golden brown.
Add the beef to the pan and cook, stirring occasionally,
for 10 minutes or until it is well browned.
Add all the remaining ingredients and stir well to mix.
Reduce the heat to low, cover
and simmer the mixture for about I hour.