Place the sausage mixture in a bowl and add the bread.

Pack one-quarter of the sausage mixture around the base of the roast and the remaining into the center.

Add sausage mixture, radicchio, Parmesan and thyme and mix well.

Put a third of the sausage mixture into the bowl of a food processor and process until it is very finely chopped but not pureed.

Allowing the sausage mixture to stand overnight, covered in the refrigerator, enhances the flavor, but it is not crucial.

Add the sausage mixture and the mushrooms to the bowl of oysters.

When the beans are cooked, drain, combine the sausage mixture with them and add the tomatoes and thyme.

Or pancetta might appear in a delicious fresh sausage mixture.

Fold the seasoned rice into the sausage mixture.

Transfer the rice to a large bowl and stir in the sausage mixture.