Place the orange peel and juice in a large bowl. Stir in 1 tablespoon olive oil and the soy sauce and vinegar. Add the steak and turn to coat. Cover and refrigerate for 30 minutes.
Meanwhile, in a heavy saucepan, bring the rice and 1 3/4 cups water to a boil. Cover; simmer for 20 minutes. Fluff with a fork and keep warm.
In a wok or large skillet, heat 1 tablespoon olive oil over high heat. Using tongs, transfer the meat from the marinade to the wok and cook, turning once, for 5 minutes. Transfer the meat to a plate.
Add the remaining 1/2 tablespoon olive oil and the scallions to the wok and cook over medium heat, stirring, until wilted, 2 minutes. Transfer to the beef. Pour the marinade into the wok and bring to a boil, then lower the heat and reduce by half. Whisk in the sugar and return the steak and scallions to the wok; turn to coat.
Stir the cilantro into the rice; season with salt. Mound some rice and beef onto each plate.