Rich beef and ale casserole

Ingredients

• 1 tablespoon Oil
• 2 medium Onion chopped
• 4 tablespoons Flour plain
• 1 teaspoon Sea Salt
• 2 teaspoons Mixed Herbs dried
• 1 kg Beef lean
• 500 ml Stout Guiness works best
• 250 ml Beef stock made with 1 beef stock cube
• 2 tablespoons Tomato puree
• 2 teaspoons Sugar caster preferably
• 5 medium Carrot peeled and thickly sliced
• 2 Parsnips peeled, halved lengthways and sliced
• Freshly ground pepper