Sweet potato-topped cottage pie recipe | Good Food

Ingredients

• 1 tbsp olive oil
• 1 onion chopped
• 1 carrot diced
• 1 celery stick, chopped
• 2 thyme sprigs
• 1 bay leaf
• 650g sweet potatoes cut into chunks
• 75ml milk
• 20g butter
• 1 small onion finely chopped
• 1 garlic clove crushed
• ½ celery stick, finely sliced
• 1 small carrot finely chopped
• 500g beef mince 10% fat
• 3 tbsp tomato & vegetable purée
• 200ml passata
• 50ml milk