Roast Beef with Horseradish Mustard Crust -

Ingredients

• 1 ½ kg (3 ½ lb) rib of beef, silverside or topside
• 2-3 tablespoon olive oil plus a little more
• 2 cloves garlic, chopped
• 2-3 large sprigs thyme, chopped
• 3 tablespoons Maille Horseradish Mustard
• 6 parsnips, peeled and halved
• 6 carrots, peeled and halved
• 1 beef stock cube
• 1 tablespoon plain flour