Leek Crumble Recipe - Great British Chefs

Ingredients

• 4 leeks, white part mainly, cut into 2cm rounds
• 25g of butter
• 50g of butter
• 50g of plain flour
• 200ml of chicken stock, or vegetable stock if making for vegetarians
• 200ml of milk
• 50g of smoked cheddar, grated
• 1 tbsp of wholegrain mustard
• 1 tsp English mustard
• 1/2 tsp salt
• 100g of rolled porridge oats
• 100g of wholemeal flour
• 25g of sesame seeds
• 2 tbsp of thyme leaves
• 100g of cheddar, grated
• 1 tsp wholegrain mustard
• black pepper, freshly ground