Combine onion powder, garlic powder, oregano, salt and pepper in a small bowl. Sprinkle 3/4 tsp. of the seasoning mixture evenly onto each side of steak. Place milk in another bowl. Combine cracker crumbs, cornstarch, rice flour and baking powder in a third bowl.
Dredge seasoned steak in cracker mixture, then in milk and coat again in cracker mixture.
Meanwhile, heat oil in deep skillet to 350 F, making sure it will reach about 3/4ths of the way up the side of the steak.
Fry steak 1-1/2 to 2 min. per side; drain well.