Cut watermelon chunks and keep aside circle rind. Begin by blending the watermelon chunks in a blender; blend thoroughly until smooth. Next, strain the mixture through a sieve.

Now, mix in the milk powder, condensed milk, and rose syrup. Blend the mixture once again. Finally, add the lemon juice and black salt, and give it one last blend.

Pour the mixture into a plastic container, secure the lid, and place it in the freezer to set for 3 hours. After 3 hours, remove it from the freezer; the ice cream should have partially set by now.

Insert ice cream sticks into circular watermelon rings, and then fill the centers of these rings with the semi-frozen ice cream mixture. To simulate the appearance of watermelon seeds, sprinkle chocolate chips or black raisins over the top.

Return the ice cream to the freezer and let it set completely for another 4 to 5 hours. Once the ice cream has fully set, take it out and cut the watermelon ice cream into triangular slices.

Serve immediately after removing from the freezer. Enjoy the delight of eating cool, refreshing ice cream.

You can enjoy this delightful ice cream even without using the ice cream sticks!