Dark & Sticky Beef Stew

WHAT YOU'LL NEED

• 800 grams stewing beef roughly chopped
• 12 medium-sized potatoes halved
• sea salt and ground black pepper
• 1 handful fresh rosemary, leaves picked finely chopped
• extra virgin olive oil
• 1 red onion, peeled and chopped
• 200 grams scrubbed baby carrots
• 1 parsnip, peeled and grated
• 2 tbsps marmite
• 2 heaped tablespoon pearl barley
• 3/4 pint Guinness
• 2 Knorr rich beef stock pot