Take two glasses , fill half of the glass with semiya payasam.
Keep it in freezer for 1 hour.
You can adjust the temperature from normal to quick freeze for faster setting.
Peel and chop the mango into cubes.Keep few cubes aside and blend the remaining mango pieces with cardamom powder.
Now after 1 hour remove the glasses from freezer , fill the glass with mango pulp till 3/4 th and again freeze it for 1 to 2 hours till its completely set.
After 2 hours, remove the glasses and add cubes mango pieces on top and top it with chopped pista slices.