Leftover Roast Lamb Moussaka

Ingredients

• 2 potatoes
• Olive oil, for drizzling and frying
• Salt and black pepper, to season
• 1 aubergine/eggplant
• 1 white onion, diced
• 1 garlic clove, finely chopped
• A pinch of fresh or dried oregano
• A pinch of ground nutmeg
• A pinch of cinnamon
• 2 tablespoons plain/all-purpose flour
• 150ml/2/3 cup white wine
• 120ml/1/2 cup full-fat/whole milk
• Freshly squeezed juice of 1/2 lemon
• 300-400g leftover roast lamb
• 200 g drained canned chopped tomatoes salad, to serve