1.Heat oil in large frying pan; cook beef, in batches, until browned. Transfer to 4.5-litre (18-cup) slow cooker. Add onion, celery, stock, port, vinegar, undrained tomatoes, thyme and sugar to slow cooker; cook, covered, on low, 8 hours.
2.Stir in basil, rind and olives; season to taste.
3.Serve beef with sauce.
Ask the butcher to cut the beef shank into 6 equal pieces for you, or you could use 6 x 300g (10 ounce) pieces beef osso buco. Dry red wine can be used instead of port. serving suggestion Serve shanks with risotto, mashed potato or soft polenta.
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