Superb Roast Rib of Beef with Yorkshire Pudding

WHAT YOU'LL NEED

• Yorkshire puddings:
• 120 g plain flour
• 2 medium eggs, beaten
• 300 ml semi-skimmed milk
• 2 grams salt and pepper
• Roast beef:
• 1 tbsp olive oil
• A 2 kg piece rib of beef (off the bone, with bones reserved)
• 2 whole bulbs garlic, halved horizontally
• 25 g butter
• 350 g carrots
• 3 sprigs thyme
• 28 grams Knorr Rich Beef Stock Pot, dissolved in
• 500 ml boiling water
• 1 tbsp flour