Mushroom & Beef Cottage Pie – Life is Better with Fruit & Vegtables

Ingredients

• 400g Portobello mushrooms
• 400g beef mince
• 1 onion, chopped
• 1 large carrot, chopped
• 1 celery stick, chopped
• 1 garlic clove, minced
• 2 tbsp flour
• 1 tbsp tomato purée
• 5 tbsp Worcestershire sauce
• 1 fresh bay leaf
• 1 tbsp olive oil
• 1 celeriac root, peeled and cut into 1cm cubes
• 1 large sweet potato, peeled and cut into 1cm cubes
• 150 ml whole milk
• 50g butter
• 2 tbsp chives, finely sliced
• Salt and pepper to season
• 30g grated cheddar (optional)