To a pot of boiling water add the orzo and cook it according to package instructions once tender reserve 1/3 cup of the pasta water and set it to the side. Drain the orzo and set to the side.
To a large skillet over medium heat add the oil once hot add the diced onion in let it soften for about 3-4 minutes. Stir in the minced garlic, pepper, and salt. Stir in the drained orzo, diced tomatoes, basil, and parmesan cheese once the cheese has melted stir in the reserved pasta water. Enjoy!