Cheesy Chard Stem Gratin Recipe - Great British Chefs

Ingredients

• butter, for greasing (approx. 20g)
• 750g of Swiss chard
• 250ml of milk
• 250ml of double cream
• 3 garlic cloves, finely chopped
• 3 bay leaves
• 1kg potatoes, scrubbed and finely sliced (there's no need to peel them)
• 3 sprigs of thyme, leaves picked
• 25g of Gruyère, grated
• 25g of Parmesan, or vegetarian equivalent, finely grated
• 20g of fresh breadcrumbs
• salt
• pepper
• 1 tsp Dijon mustard, heaped
• 1 tbsp of white wine vinegar
• 3 tbsp of extra virgin olive oil