Atul Kochhar’s Chicken Tikka Masala Pie

Ingredients

• 400g chicken breasts cut into chunks
• 1 garlic clove, peeled
• 1cm piece of fresh ginger, peeled
• 1 tsp chilli powder
• juice of ½ a lemon
• 250g Greek-style yogurt
• 1 tsp garam masala
• 1 tsp ground coriander
• 50ml vegetable oil
• ½ tsp ground cinnamon
• ½ tsp chilli powder
• ½ tsp dried fenugreek leaves
• 2 tsp flour
• small knob of butter
• 2 tsp lime juice
• 1 tsp chaat masala or garam masala
• 250g plain flour, plus extra for dusting
• 1 tsp sea salt
• 250g cold unsalted butter
• 1 small onion, peeled
• 10 garlic cloves, peeled
• 6cm piece of fresh ginger, peeled
• 3 tsp ground coriander
• 3 tsp chilli powder
• 3 tsp turmeric
• 3 tsp garam masala
• 2 large bunches of fresh coriander, leaves picked
• 3 ripe tomatoes