Bring a large pot of salted water to a boil. Cut an X in the bottom of the stems of the broccoli rabe and place in the boiling water. Cook until tender but still firm, about 5 minutes. Drain.
In a large heavy skillet over medium heat, heat olive oil and saute garlic for 1 to 2 minutes. Stir in the broccoli rabe and saute 10 to 15 minutes, or until desired doneness. Dust with parmesan cheese, if desired.