Slow cooker BBQ beef

Back from a week in Normandy with extended family. Fresh croissants, excellent galletes in St Lo, Friuts de Mer in Bayeux, and all started with yummy beef cooked by my sister. Must remember to get her bbq chicken recipe (although it might be very similar!)

1 kilo braising steak

1 onion

6 fl oz tomato ketchup

4 fl oz water

1 tsp mustard

1 tbsp Worcestershire sauce

Brown meat then add all ingredients to slow cook pot on low for minimum of 12 hours