Heat oil in a large frying pan. Add onions, carrots and garlic. Cook until onion is transparent. Add the osso bucco steaks and brown on both sides.
Add tomato paste, wine, soup/pasta sauce or tomatoes, stock powder and water. Reduce heat and allow to simmer for 5 minutes. Cover pan with lid, reduce heat to low, and simmer for 1-1 1/2 hours until beef is tender. Sprinkle with salt (if needed) to suit your tastes.
Serve over prepared polenta and garnish with fresh chopped parsley.
Notes
Refrigerate left overs in airtight container for up to 3 days or freeze for up to 3 months.