01 -  Heat a skillet over medium-high heat. Add ground beef and cook, stirring frequently, until browned and cooked through. Season lightly with salt and pepper as desired. 
 02 -  Combine crumbled feta cheese, plain yogurt, and dried oregano in a mixing bowl. Stir until the mixture is smooth and creamy. 
 03 -  Lay out the whole wheat tortillas on a clean surface. Evenly distribute shredded lettuce, diced tomato, and sliced red onion down the center of each tortilla. Add cooked ground beef and top with a generous spoonful of yogurt-feta sauce. 
 04 -  Carefully roll each tortilla into a wrap, securing the filling inside. Serve immediately.