Wash sago well in water. Take it in a pressure cooker. Add 2 cups of water to it, pressure cook for 1 whistle. Turn off the heat and set aside so the pressure releases.
Now take 1 cup of pineapple in a blender and make it into a fine puree. Take it in a sauce pan. Add 1 cup of cubed pineapples and boil it for 5 mins. Add ½ cup of sugar and mix well. Cook till it thickens lightly. Add some yellow colour and mix well. Now set aside this mix to cool completely.
Boil milk in a sauce pan.
Now take sago in a pan, add sugar and mix well. Cook this for a min or so.
Add hot milk in this and mix well. Cook till it thickens slightly.
Now take it off the heat and cool down completely.
Now once the mix is cooled, add the pineapple into the milk and mix well.