Light chicken korma

INGREDIENTS

• 1 onion , chopped
• 2 garlic cloves , roughly chopped
• thumb-sized piece ginger , roughly chopped
• 4 tbsp korma paste
• 4 skinless, boneless chicken breasts , cut into bite-sized pieces
• 50g ground almonds , plus extra to serve (optional)
• 4 tbsp sultanas
• 400ml chicken stock
• ¼ tsp golden caster sugar
• 150g pot 0% fat Greek yogurt
• small bunch coriander , chopped