Slow cooker beef topside with red wine gravy recipe | Good Food

Ingredients

• 1 tbsp black peppercorns
• 1 tbsp English mustard powder
• 2 tbsp chopped rosemary
• 1 tsp celery seeds
• 15g dried porcini mushrooms
• 4 tbsp olive or rapeseed oil
• 1.6kg beef topside cut into 12 slices
• 600ml hot beef stock
• 1 large carrot peeled and roughly chopped
• 1 large onion roughly chopped
• 2 sticks celery roughly chopped
• 2 tbsp tomato purée
• 200ml red wine
• 1 tbsp cornflour (optional)