Chicken korma

• 1 cup cashews soaked overnight in cold water then drained
• 1 tsp crushed ginger
• 3-4 garlic cloves
• 3 tbsp garam masala/
• 1 tsp ground coriander
• ½ tsp ground cumin
• 1 tsp ground cinnamon
• ½ tsp ground cardamom
• 2 tsp salt
• 2 cups Greek yoghurt
• 2 lb/1kg boneless skinless chicken thighs cubed

for the curry

• 2 tbsp butter
• 1 red onion finely chopped
• 2 garlic cloves crushed
• 1 tbsp korma curry powder
• 1-2 cup chicken stock
• salt and black pepper to taste
• 1-2 tsp sugar optional

to serve

• fresh cilantro/coriander