Preheat your oven to 350°F (175°C) and lightly grease a small oven-safe ramekin or baking dish with a touch of ghee.
In a medium-sized mixing bowl, whisk together the Greek yogurt, salted caramel protein powder, egg, and vanilla extract until the mixture is completely smooth and reaches a thick, cheesecake-like consistency.
Pit and thinly slice the peach, then layer the slices evenly into the bottom of the prepared baking dish.
Pour the salted caramel yogurt mixture over the sliced peaches, using a spoon to spread it into an even layer that completely covers the fruit.
In a separate small bowl, stir together the rolled oats, chopped pecans, maple syrup, almond butter, melted ghee, and sea salt until the oats are well coated and form small clumps.
Sprinkle the oat crumble mixture evenly over the top of the yogurt custard layer.
Place the dish in the oven and bake for 25 to 30 minutes, or until the custard is set and the crumble topping is golden brown and fragrant.
Remove from the oven and let the dish cool for at least 5 to 10 minutes to allow the cheesecake layer to firm up before serving.