Melt butter in a large skillet over medium-high heat. Cook green onions in butter briefly, then add the rice. Cook and stir for a few minutes to toast rice. Stir in water, and season with chicken bouillon and pepper. Bring to a boil, then reduce heat to medium-low. Cover, and simmer for 20 minutes.
Remove from heat, cover, and let stand for 5 minutes. Stir in the Parmesan cheese.
