How to Make It
Zest lime, then cut off and discard outer white membrane. Chop remaining lime into small pieces, reserving juices.
Combine lime zest and pieces with their juices, sugar, and 1/4 cup water in a small saucepan. Cook over high heat until boiling. Let cool slightly. Pour lime dressing over watermelon in a bowl and mix to combine.
Note: Nutritional analysis is per 1 1/2-cup serving.