1. Blend watermelon and lemon juice till smooth.
2. Dissolve sugar in water on low heat.
3. Heat till mixture boils (approx. 5 minutes).
4. Remove from and heat and cool till warm.
5. Add it to watermelon juice.
6. Chill the lemonade.
7. Pour into glasses filled 1/4th with crashed ice.
8. Serve immediately.

Making Time: 20 minutes
Shelflife: 2-3 days