2 tablespoons sunflower oil
1 cinnamon stick, broken up into small pieces
2 onions, roughly chopped
1 green chili, roughly chopped
2 garlic cloves, roughly chopped
1-inch piece of fresh root ginger, peeled and roughly chopped
50g (⅓ cup) cashew nuts (about 28 cashews)
1 tablespoon white poppy seeds (don't substitute black poppy seeds)
100ml (3 1⁄2 fl oz) water
1 teaspoon salt
1 teaspoon garam masala
1 teaspoon chili powder
200ml (7fl oz) boiling water
650g (1lb 7oz) boneless, skinless chicken thighs, cut into 5cm (2 inch) pieces
1 tablespoon heavy cream
¾ cup fresh cilantro leaves, finely chopped