Bring a large pot of salted water to boil and cook the orzo until partially cooked, but not fully cooked (about 5 minutes). Drain the pasta, rinse with cold water to stop the cooking, and set aside.
1 cup orzo
While the orzo is cooking, heat another large pot over medium high heat, add the olive oil, then add the chopped onion. Cook until translucent, 5-7 minutes.