Mix Greek yogurt with vanilla extract for the banana cheesecake flavor
Remove some yogurt before adding extra ingredients
For strawberry Oreo version, mix finely chopped strawberries into yogurt
Crush Oreo thins and mix into the strawberry yogurt mixture
Add crushed Graham crackers to both flavors and mix well
Transfer mixture to a container or serving dish
Refrigerate for at least 12 hours or overnight
Top with whipped cream before serving
