Preheat your oven to 425°F (220°C) and line a baking sheet with parchment paper.
In a medium bowl, combine the Greek yogurt and self-rising flour, stirring until a dough ball forms.
Turn the dough onto a lightly floured surface and knead for 1-2 minutes until smooth and no longer sticky.
Roll the dough out into a large circle, approximately 10 inches in diameter, on the parchment paper.
Cut the string cheese sticks in half lengthwise and place them around the perimeter of the dough, about half an inch from the edge.
Fold the outer edge of the dough over the cheese sticks and press firmly to seal the stuffed crust.
Spread the tomato sauce evenly over the center of the dough, then sprinkle with garlic powder, oregano, sea salt, and black pepper.
Top with the shredded mozzarella cheese and turkey pepperoni slices.
Bake for 12-15 minutes, or until the crust is golden brown and the cheese is bubbly and melted.
Let the pizza rest for 2 minutes before slicing and serving.