In a medium saucepan saut onion in butter until it is soft but not browned. Add the remaining ingredients and bring to a boil. Reduce heat and simmer 30 minutes. Add sliced leftover roast and heat.

sausages and even pork. After the sauce had simmered for 30 minutes I cut up the beef in slices and added - simmering for an additional 10 minutes. Turned out nice and tender.