Preheat your oven to 375°F (190°C).
Core and thinly slice the apple, then place the slices into a small oven-safe ramekin or individual baking dish.
Sprinkle the apple slices with the water and half of the ground cinnamon, tossing gently to coat the fruit evenly.
In a separate small bowl, combine the rolled oats, the remaining ground cinnamon, sea salt, and slivered almonds to create the crumble topping.
Spread the oat mixture over the apples in an even layer, pressing down slightly to ensure it adheres.
Bake for 20 to 25 minutes until the apples are tender when pierced with a fork and the oat topping is golden brown.
While the crisp is baking, whisk together the non-fat Greek yogurt, vanilla protein powder, and vanilla extract in a bowl until the mixture is completely smooth and creamy.
Remove the dish from the oven, let it cool for 5 minutes, and then top with the prepared protein yogurt cream before serving warm.