Welsh Lamb moussaka

Ingredients

• 450g lean PGI Welsh Lamb mince
• 3 large aubergines, peeled and sliced 1cm thick
• 2 large potatoes, peeled and sliced 1cm thick
• 2 tbsp olive oil
• 2 onions, finely chopped
• 3 garlic cloves, crushed
• 400g tin chopped tomatoes
• 2 tbsp tomato purée
• ¼ tsp cinnamon
• 1 tsp oregano
• Salt and pepper
• Extra salt for salting the aubergines
• 1 tbsp flour for sprinkling the aubergines
• 2 bay leaves
• Small glass red wine
• Breadcrumbs for bottom of casserole dish (optional)
• 100g unsalted butter
• 100g plain flour
• 900ml whole milk
• Pinch of salt and pepper
• ½ tsp ground nutmeg
• 100g grated Parmesan cheese
• 2 egg yolks