Melt the butter in a medium saucepan over medium heat.
Add the orzo and cook, stirring frequently, for 2–3 minutes until the orzo is lightly toasted.
Pour in the stock and add a pinch of kosher salt and some black pepper; bring to a boil.
Reduce the heat to low, cover, and simmer for 12–15 minutes, stirring once or twice so the orzo does not stick, until the liquid is absorbed and the orzo is tender.
Remove from heat and stir in the grated Parmesan and the chopped fresh herbs (or dried herb mixture). Taste and adjust seasoning with salt and pepper.
Serve warm as a side dish.