In 3 1/2- to 6-quart slow cooker, combine bulgur, onions, 1 teaspoon of the oregano, pepper, garlic, broth and lemon juice; mix well. Sprinkle turkey breast half with salt and remaining 1/2 teaspoon oregano. Place turkey on top of bulgur mixture.
Cover; cook on low setting for 4 to 5 hours.
Remove turkey from slow cooker. Cut turkey into slices. Stir olives and cheese into bulgur mixture. Serve turkey with bulgur mixture.