Strawberry Rhubarb Lemonade

Ingredients

 * 3½ cups water
 * ½ pound rhubarb, trimmed and cut into 1-inch pieces (about 2 cups)
 * ¾ cup sugar, or to taste
 * 2 x 3-inch strips of lemon zest removed with a vegetable peeler plus additional for garnish
 * ½ teaspoon vanilla
 * 2 cups sliced strawberries
 * 1 cup fresh lemon juice

Directions

 * 1) In a saucepan stir together the water, the rhubarb, the sugar, 2 strips of the zest, and the vanilla, bring the mixture to a boil, stirring until the sugar is dissolved, and simmer it, covered, for 8 minutes.
 * 2) Stir in 1 cup of the strawberries and boil the mixture, covered, for 2 minutes.
 * 3) Let the mixture cool and strain it through a coarse sieve set over a pitcher, pressing hard on the solids.
 * 4) Stir in the remaining 1 cup strawberries and the lemon juice, divide the lemonade among stemmed glasses filled with ice cubes, and garnish each glass with some of the additional zest.