1 cup plain Greek yogurt
1/2 cup orange juice
1/3 cup diced strawberries
1/4 cup diced rhubarb (about 1/2 thin stalk)
1/4 cup granulated sugar (or sugar substitutes, check package for equivalence)
2 teaspoons vanilla extract
1 cup ice
Place the yogurt, juice, strawberries, rhubarb, sugar, and vanilla in a blender and blend on high speed until smooth. Add the ice and and blend until the ice is crushed and the mixture thickens. Pour into 2 glasses and serve with straws.