Over the stove, dissolve the sugar in about 1 cup of water. Bring it to a gentle boil, then set it aside to cool—this is your simple syrup.
Next, add fresh watermelon chunks to a blender. Squeeze in the juice of your lemons and blend for 30 seconds to 1 minute until smooth.
Pour in the cooled simple syrup and blend for a few more seconds to combine.
Transfer the mixture into a pitcher filled with ice. For an extra kick, toss in a few mint leaves and lemon slices.
Serve cold and enjoy this refreshing summer drink!
