This is a rustic dish of bangers, simply cooked in the oven in a rich onion sauce. Try to use pure pork sausages with no added starch, coarsely ground in the southern French or Italian style.This is a rustic dish of bangers, simply cooked in the oven in a rich onion sauce. Try to use pure pork sausages with no added starch, coarsely ground in the southern French or Italian style.