Heat the oil in a skillet over medium-high heat, and cook the garlic and red pepper 1 minute, until garlic is golden brown. Stir in chicken, season with salt, and cook 2 to 5 minutes, until lightly browned and juices run clear. Reduce heat to medium, and mix in the parsley and cooked orzo. Place spinach in the skillet. Continue cooking 5 minutes, stirring occasionally, until spinach is wilted. Serve topped with Parmesan cheese.