In a large bowl, combine yogurt, vanilla extract, and lemon juice. Fold in the whipped topping.
Layer Parfaits
Add blueberries in the bottom of 6 12-ounce glasses or dessert dishes. Layer with yogurt mixture, then strawberries, followed by another layer of yogurt and finally top with strawberries. Add mint leaves before serving.
Notes
Serving: If not serving immediately, cover and refrigerate for up to an hour for best results.