Heat a pan/kadai adding white sesame seeds and roast them in low flame. When the seeds puff up and change color to brown, switch off the flame.Let it cool.
You can find aroma of roasted sesame seeds spreading all around the kitchen.
Add roasted sesame seeds in to a mixer and powder it coarsely. Transfer it to a wide bowl. Add cardamom powder as well to the same bowl.
Now heat a pan/kadai adding jaggery and 1/4 cup of water. Keep stirring till you get the jaggery syrup of soft ball consistency.That is, when you put a drop of jaggery syrup in to small bowl of water, you should be able to make soft ball out of that drop. It should not get dissolved. Keep checking and when it reaches the consistency switch off the flame.
Add the ready jaggery syrup to sesame laddo mix in the bowl. Mix well. When your palm can bear the heat of the laddo mix, take handful of it and shape it in the form of laddo.
Delicious til ke laddos/sweet sesame balls are ready.