Heat oil in medium saucepan over mediumhigh heat. Add garlic and turmeric; stir 1 minute. Add 1 2/3 cups water, lemon peel, and 1/2 teaspoon coarse salt; bring to boil. Remove pan from heat. Stir in couscous. Cover; let stand until liquid is absorbed, about 5 minutes. Fluff with fork; mix in cilantro and lemon juice. Season with pepper and additional coarse salt, if desired.