CHICKEN CURRY WITH BABY LEAF GREENS

300g chicken breast chunks • 4 tbsp full fat Greek natural strained yogurt • 3 tsp hot curry powder • 1 onion, very roughly chopped • 2 large garlic cloves, very roughly chopped • 20g fresh root ginger, very roughly chopped • 4 tsp sunflower oil • 400g can chopped tomatoes • 1 tbsp mango chutney, plus extra to serve • 200g pack Waitrose & Partners Baby Leaf Greens, shredded and chopped • 1 naan bread, to serve