1. Place cucumber slices in pitcher. Add lemon slices, if using.
2. Fill the pitcher with cool (preferably filtered) water. For a stronger flavor, allow the cucumber/lemon water to set in the refrigerator for 1-5 hours (longer is better) before continuing to the next steps.
3. Once the water is nice and cucumber-y, add the lemon juice and sugar. Stir well, and adjust flavor, as necessary.
For the best results (a light, sweet, and refreshing beverage) add as little sugar and lemon juice as possible (without killing the flavor). I believe the lemonade is more flavorful after settling overnight. Have variations of ingredients for this recipe? Feel free to share in the comments below!
Source of recipe: I was playing around in the kitchen, and this is what I came up with.