In a saucepan, combine 1 cup of water, 3/4 cup sugar, 1 teaspoon rock salt, 2 teaspoons crushed ginger, and 1/2 teaspoon cumin.
Bring the mixture to a boil to create a simple syrup.
Once the syrup is ready, remove from heat and let it cool.
Add the remaining 3 cups of water and 1 cup of lemon juice to the syrup.
Stir the mixture well and refrigerate until ice cold.
When ready to serve, pour the lemonade over ice or blend with ice for a slushy texture.
Garnish with fresh mint leaves and enjoy your refreshing Ginger Lemonade Sekanji.