Cut wonton wrappers into 1/2-inch strips, and cut pork into 3- x 1-inch strips; set aside.
Toast 1/2 cup sesame seeds in a large heavy skillet over medium-high heat, stirring constantly, 2 to 3 minutes; remove from skillet.
Pour 1/2 cup vegetable oil into skillet; heat to 375°. Fry wonton strips in batches until golden. Drain on paper towels; set aside. Drain skillet.
Combine remaining 1/4 cup sesame seeds, flour, salt, and pepper in a heavy-duty zip-top plastic bag; add pork. Seal and shake to coat.
Pour 2 tablespoons sesame oil into skillet; place over medium heat. Fry half of pork in hot oil, stirring often, 6 to 8 minutes or until golden. Remove and keep warm. Repeat procedure with remaining 2 tablespoons sesame oil and pork.
Process toasted sesame seeds, remaining 1/2 cup vegetable oil, soy sauce, and vinegar in a blender 1 to 2 minutes or until smooth.
Combine pork and green onions; drizzle with soy sauce mixture, tossing gently.
Combine mixed greens and bok choy; top with pork mixture and fried wonton strips. Serve immediately.