Scalloped Potato Shepherd's Pie - Ainsley Harriott

Ingredients

• 500g floury potatoes, thinly sliced
• 1 teaspoon vegetable oil
• 2 carrots, diced
• 1 onion, finely chopped
• 450g lean minced lamb
• 300ml hot lamb stock
• 1 tablespoon brown sauce
• 2 tablespoons soy sauce
• 1 tablespoon cornflour
• 100g frozen peas
• few drops of Tabasco sauce
• 3 tomatoes, thinly sliced
• 50g reduced-fat cheddar cheese, finely grated (optional, but nice)
• salt & freshly ground black pepper