• 1 large aubergine sliced lengthways into 1/2 inch slices
• 2 large Maris Piper potatoes peeled and sliced lengthways into 1/2 inch slices
• 1 red onion finely chopped
• 1 large white onion finely chopped
• 1 lb beef or lamb mince
• 4 cloves garlic crushed
• 2 green chillies crushed
• 1 cinnamon stick
• 1 400 g tin chopped tomatoes blended
• 1 tbsp tomato puree
• 2 tsp Cumin powder
• 1 tsp Coriander powder
• 1/2 tsp Red chilli powder
• 1/2 tsp Turmeric Powder
• Salt and black pepper to taste Use plenty of black pepper here
• 4 tbsp Olive oil

Sauce

• 100 g butter
• 100 g plain flour
• 725 ml full fat milk
• 3 eggs beaten
• 3 tbsp plain yoghurt
• 100 g Gruyere cheese grated Divided into 2
• 50 g parmesan cheese grated Divided into 2
• Pinch nutmeg