Slow cooker shepherd's pie recipe | Good Food

Ingredients

• 1 tbsp olive oil
• 1 onion finely chopped
• 3-4 thyme sprigs
• 2 carrots finely diced
• 250g lean (10%) mince lamb or beef
• 1 tbsp plain flour
• 1 tbsp tomato purée
• 400g can lentils or white beans
• 1 tsp Worcestershire sauce
• 650g potatoes peeled and cut into chunks
• 250g sweet potatoes peeled and cut into chunks
• 2 tbsp half-fat crème fraîche