3 1/2 C. water
1 C. fresh basil leaves plus additional for garnish
2 nectarines
3/4 C. sugar, or to taste
1 C. fresh lemon juice

In a small saucepan stir together 2 C. the water, 1 C. the basil, 1 of the nectarines, chopped coarse, and the sugar, bring the mixture to a boil, stirring until the sugar is dissolved, and simmer it for 5 minutes. Let the mixture cool and strain it through a fine sieve set over a pitcher, pressing hard on the solids. Stir in the remaining 1 1/2 C. water, the remaining nectarine, sliced thin, and the lemon juice. Divide the lemonade among tall glasses filled with ice cubes and garnish each drink with some of the additional basil.