Bring water to a boil in a small saucepan; stir in couscous. Remove from heat; cover and let stand 10 minutes. Fluff with a fork.
Place 1 teaspoon oil in an electric skillet; heat to 375°. Add onion, bell peppers, and garlic; sauté 5 minutes. Combine couscous, onion mixture, cheese, and remaining ingredients in a large bowl; stir well.
Place 1/2 teaspoon oil in skillet; heat to 375°. Place 1/3 cup couscous mixture for each of 4 portions into skillet, shaping each portion into a 3-inch cake in the skillet. Cook 6 minutes or until golden brown, turning cakes carefully after 3 minutes. Repeat procedure with remaining oil and couscous mixture.