Chicken thighs are good value and tasty, just right for this healthy, versatile curry. It's also packed with veggies such as spinach, sweet potato and tomatoes.
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 another min.
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.