Soak jaggery in water. Soaking time will vary from 20 minutes to 2 hours. (Depending on size and hardness of jaggery pieces).
When jaggery is dissolved strain liquid in a fine strainer to remove impurities.
Now, soak basil in ½ cup water for 5 minutes.
In a jug, mix jaggery water, basil seeds and lemon juice. Adjust the water and lemon quantity if required.
Serve it chilled and garnish with mint leaves and lemon slices.
Notes
You can always make it without basil seeds and lemon juice. Keep it simple jaggery water!
Another variation is adding 1 tablespoon ginger powder and ½ teaspoon black salt.
Jaggery Cashew Drink: Cashew, mint, cumin, black salt add striking flavor to jaggery water. Add fist full or about 50 grams cashew and other ingredients to the jaggery while soaking. Then blend the drink until smooth. Strain and follow the steps as it is to make a deliciously creamy white gud ka sharbat. If you wish you can add a tiny green chili and a tiny piece of ginger too. Skip the basil.