1/2 teaspoon lemon juice
6 cups water
1/2 teaspoon sugar
1 tablespoon lemon zest
1 large orange, halved
1 cup fresh lemonade
In a large saucepan, combine lemon juice, water, sugar, lemon zest and orange. Bring to a boil, stirring constantly. Reduce heat to medium, and whisk lemonade into lemon mixture. Boil, stirring constantly, for 5 minutes.