Grate 2 tablespoons rind, and squeeze 1/2 cup of juice from oranges; set aside. Steam broccoli, covered, 10 minutes or until crisp-tender.
Melt margarine in a small skillet over medium heat. Add garlic, and sauté 1 minute. Add orange rind, juice, salt, and pepper; bring to a boil. Reduce heat, and simmer, uncovered, for 2 minutes. Pour over broccoli, and toss well.