Spicy harissa aubergine pie - Good Food Middle East

Ingredients

• 3 tbsp olive oil
• 2 aubergines, cut into chunks
• 2 red onions, finely sliced
• 2 large garlic cloves, crushed
• 2 tbsp rose harissa paste
• 1 tbsp ground coriander
• 400g can cherry tomatoes
• 250g pouch cooked puy lentils
• 100g pitted green olives
• 1 small bunch parsley, finely chopped
• 1.3kg sweet potatoes, peeled and cut into 3cm chunks
• 100g feta, crumbled