Dry roast oats in a medium heat until nice nutty aroma comes out, it takes approximately 5 - 6 minutes. Transfer oats to a plate and allow it to cool.
Dry roast sesame seeds in a medium heat until the sesame seeds start to pop and the color changes into a light golden brown. Transfer sesame seeds to the plate and allow it to cool.
Dry roast almonds until it becomes crispy. Allow it to cool ,
In a blender add roasted oats, sesame seeds, almonds, grated jaggery and blend it to a fine powder. Transfer it to a wide bowl.
Add warm milk little by little and shape them into small balls.
Cool them completely and store it in an airtight container for up to a week in the refrigerator