Beef Stew - Cooking like a Boss

True zero-pre-cooking slow cooker beef stew. Really tasty and very easy. Serve with mash.

600ml ³⁄₅l 40tbsp 120tsp 2.54cup 1.06pint boiling water			mix up in slow cooker and cook for 8-10 hours on low
1 beef stock cube	crumble
2 tbsp 0.03 l 30 ml 6 tsp 0.127 cup 0.053 pint tomato purée
1 tbsp 0.015 l 15 ml 3 tsp 0.063 cup 0.026 pint Marmite
900g 0.9kg 1.98lb 31.7oz braising steak	cut into 3cm chunks
100g 0.1kg 0.22lb 3.53oz smoked bacon lardons
2 onions	thinly slice
4 carrots	peel	cut into 3cm chunks
4 celery sticks	cut into 3cm lengths
3 tbsp 0.045 l 45 ml 9 tsp 0.19 cup 0.079 pint plain flour
1 tsp 0.005 l 5 ml ¹⁄₃ tbsp 0.021 cup 0.009 pint salt
1 tsp 0.005 l 5 ml ¹⁄₃ tbsp 0.021 cup 0.009 pint dried mixed herbs
1 bay leaf
ground black pepper