Preheat your oven to 425°F and line a baking sheet with parchment paper.
In a small skillet over medium heat, cook the lean ground turkey until fully browned and crumbled, then set aside.
In a mixing bowl, combine the nonfat Greek yogurt, flour, baking powder, and sea salt. Stir until a dough forms, then knead gently on a floured surface for 1-2 minutes.
Roll the dough out into a thin circle, approximately 8-9 inches in diameter.
Slice the string cheese stick into long, thin strips and place them around the perimeter of the dough circle, about half an inch from the edge.
Fold the outer edge of the dough over the cheese strips and press firmly to seal the stuffed crust.
Spread the tomato sauce evenly over the center of the pizza dough.
Top with the cooked ground turkey, chopped Canadian bacon, and turkey pepperoni.
Sprinkle the shredded mozzarella, dried oregano, and garlic powder over the meat toppings.
Bake for 12-15 minutes until the crust is golden brown and the cheese is bubbly.