Slow cooker beef stew - Good Food Middle East

Ingredients

• 1 onion, chopped
• 2 celery sticks, finely chopped
• 2 tbsp rapeseed oil
• 3 carrots, halved and cut into chunks
• 2 bay leaves
• ½ pack thyme
• 2 tbsp tomato purée
• 2 tbsp Worcestershire sauce
• 2 beef stock cubes or stock pots
• 900g beef for braising such as skirt, buy a whole piece and cut it yourself for bigger chunks or buy ready-diced
• 2 tsp cornflour (optional)
• ½ small bunch parsley, chopped
• buttery mash, to serve (optional)