Snap off tough ends of 1/2 pound asparagus; place asparagus on a square of heavy-duty aluminum foil. Spoon 2 teaspoons reduced-calorie margarine over asparagus, and sprinkle with 1/4 teaspoon lemon-pepper seasoning. Fold aluminum foil tightly to seal.
Place on grill rack, and grill over medium-hot coals 10 minutes.