It is best to use a nicely ripe mango, this can be seen from the orange color of the skin.
Cut the mango into pieces and mix with a chopper or hand blender to a puree. Add 3 tablespoons of the yoghurt to the puree and about 1 - 2 cm from the chilli. If you like it spicier, more. Mix everything together again and make sure that the chilli is small, otherwise continue mixing a little. Then add a little salt and pepper to taste.