4 cups diced rhubarb
1/2 cup white sugar
4 cups ice
2/3 cup tequila
Place the rhubarb into a saucepan, and pour in the water. Cover, and bring to a simmer over medium heat. Reduce heat to medium-low, and continue simmering until the rhubarb breaks down and releases its juices, about 15 minutes. Strain the juice, and press the pulp to squeeze out as much liquid as you can. Discard the pulp, and stir the sugar into the hot juice. Refrigerate the syrup until very cold, at least 2 hours.
Place 2 cups crushed ice in blender, pour 1/3 cup tequila and half of the rhubarb syrup (approximately 1 1/2 cups), and blend until smooth. Add water as necessary to blend to desired consistency. Garnish with lime wedge. Hope you enjoy!