How to Make It
Combine 1 tablespoon water and cornstarch in a small bowl, stirring with a whisk. Combine remaining 2 tablespoons water and 1 1/2 cups blueberries in a small saucepan over medium heat; bring to a boil. Reduce heat and simmer 3 minutes or until blueberries begin to break down. Gradually add cornstarch mixture, stirring constantly with a whisk; cook 1 minute or until slightly thickened. Remove pan from heat. Stir in remaining 3/4 cup blueberries, sugar, juice, cinnamon, and salt. Let stand 5 minutes.
Scoop 1/2 cup frozen yogurt into each of 6 bowls or dessert glasses. Spoon about 1/3 cup blueberry mixture over each serving; sprinkle evenly with crumbled cookies. Serve immediately.