Moussaka

Ingredients

• 3 aubergines
• 2 potatoes
• Salt
• Olive oil
• 1 tbsp olive oil
• 400 g minced beef
• 1 tsp salt
• ½ tsp black pepper
• 1 red onion
• 1 cinnamon stick
• 2 cloves
• ½ tsp ground nutmeg
• 2 garlic cloves
• 1 tbsp tomato paste
• 400 g canned chopped tomatoes
• Splash of water
• 1 tsp sugar
• 1 bay leaf
• 50 g unsalted butter
• 50 g plain flour
• 500 ml milk
• 1 egg yolk
• 30 g Parmesan cheese
• ¼ tsp ground nutmeg
• pepper