Aubergine and beef shakshuka

Ingredients

• 1 aubergine, cut into 3cm chunks
• 2 tbsp olive oil
• 1 x 250g pack beef mince
• 1 onion, finely sliced
• 2 garlic cloves, finely chopped
• 1 tsp ground cinnamon
• 1 tsp ground cumin
• ½ tsp smoked paprika
• ½ tsp crushed chillies
• 2 x 400g tins chopped tomatoes
• 1 tsp sugar
• 4 medium eggs
• 1 tbsp tahini paste
• 1 tbsp natural yogurt
• a squeeze of lemon juice
• 1 preserved lemon, pips discarded, finely chopped
• 50g feta cheese, crumbled
• ½ x 28g pack flat-leaf parsley, leaves chopped
• a pinch of sumac
• toasted pitta breads