Replace the rogan josh curry paste with Thai green curry paste and add ½ a 400ml can coconut milk instead of the water.
Cook the sweet potatoes in boiling,
salted water for 5-7 mins until just tender.
Drain well, then set aside. Meanwhile,
heat the oil in a large frying pan, then add
the chicken and onion. Cook for 5-6 mins
until the chicken is browned and cooked
through. Stir in the curry paste, cook for
1 min, add the tomatoes, then cook for
Pour in 100ml boiling water and mix
well. Simmer for 5 mins, add the spinach,
then cook for 2 mins until wilted. Fold in
the potatoes and heat through. Serve
with rice and naan breads.