The Toast (The Pilaf Method): Melt 2 tbsp of butter in the skillet over medium heat. Add the dry orzo and garlic. Stir constantly for 2–3 minutes until the pasta turns a light golden brown and smells nutty. This "toasting" step creates a barrier on the pasta that prevents it from becoming mushy and adds a deep, roasted flavor profile.
The Absorption: Carefully pour in the water or broth. Bring to a simmer, then turn the heat to medium-low. Cover and cook for 8–10 minutes, stirring occasionally. The orzo will absorb the liquid, releasing its natural starches to create a built-in "sauce."
The Finishing Glaze: Once the liquid is almost gone and the orzo is tender, add the remaining 2 tbsp of butter, the frozen peas, and the Parmesan cheese.
Residual Heat Cooking: Turn off the heat. Stir the mixture for 60 seconds. The residual heat from the pasta is enough to perfectly steam the frozen peas and melt the cheese into a velvet-like glaze without overcooking the delicate pasta.
Waste Control: If you have a few slices of lemon or a pinch of red pepper flakes in the pantry, add them at the end to "brighten" the dish for free. Plan B: Leftover orzo makes a great cold pasta salad base—just add a splash of vinegar and some diced cucumbers the next day.