Cottage Pie with Sweet Potato – Healthy Life

Ingredients

• 1 tbsp olive oil
• 1 medium brown onion, finely chopped
• 2 medium carrots, peeled, finely chopped
• 3 celery stalks, trimmed, finely chopped
• 480 g mince beef, low fat
• 90 g lentils
• 2 tsp Worcestershire sauce
• 2 tbsp tomato paste
• 400 g can crushed tomatoes
• 1 stock cube
• 250 ml water
• 1 tsp mixed herbs
• 2/3 cup frozen peas
• 600 g orange sweet potato, peeled, chopped
• 1/4 cup milk
• 1/3 cup grated cheddar cheese