Heat the oil in a large pot. Add the onion and cook until softened. Add the garlic and ginger and cook for another minute.
Add the korma paste, cashew nuts, and turmeric. Cook for another minute.
Add the chicken stock and bring to a boil. Reduce heat and simmer for 15 minutes.
Add the chicken breasts and cook for another 10 minutes, or until cooked through.
Blend the soup until smooth.
Season with salt and pepper to taste.
Garnish with fresh coriander and a dollop of Greek yoghurt.
For the flatbreads, mix the flour, baking powder and salt in a bowl.
Add the water and oil and mix to form a dough.
Roll out the dough and cut into circles.
Cook the flatbreads in a hot pan for 2-3 minutes per side, or until golden brown.