Slice the sausage in disks (or remove it from its casing, if desired.) Place in pan over low heat to brown and gradually render out the fat, for about 10 minutes.

Stir the sausage, and add the onion and mushrooms. Stir them around to coat with fat, then continue to cook over low heat until onion is softened and the sausage is well browned.

Rinse and drain chick peas, and add to pan, along with tomatoes and basil. Bring to a low boil, then simmer 20 - 30 minutes. Taste for seasoning and adjust if needed at about the 20 minute mark.