I haven’t tested is specifically, but I’m sure it could be done! I would cook the onion, garlic, and orzo on the saute setting. Hit cancel, stir in the rice, salt, parsley, pepper, and oregano and pour in the chicken broth (reduce the amount of chicken broth to 2 1/3 cups), add lid, then select pressure cook and change the time to 3 minutes. After the cooking time is up, let the pressure release naturally for 10 minutes, then move the valve to release any remaining pressure. Remove lid, fluff rice pilaf, and stir in the parmesan cheese.