Sausages

1 (3/4- to 1-pound) round Italian loaf, cut into 1-inch cubes (8 cups) 2 tablespoons olive oil, divided 2 pouns sweet Italian sausage, casings removed,[...]

1 pound pork andouille sausage, sliced crosswise 1/3 inch thick 1 tablespoon vegetable oil 2 green bell peppers, finely chopped 2 celery ribs, finely chopped[...]