Lime Refresher - cooking recipe

Ingredients

10 c. water
2 1/4 c. sugar or to taste
3 c. fresh lime juice (from about 24 limes)
1 lime, sliced very thin
mint sprigs for garnish
gin, vodka or rum (optional)

Preparation

In a saucepan, cook 3 cups of water with sugar over moderate heat, stirring, until sugar is dissolved.
Remove pan from heat and cool syrup.
In a large pitcher, stir together syrup, remaining 7 cups water, lime juice and lime slices and garnish with mint.