sauce has thickened into a creamy coating. The top should have a few golden spots, and the peas will be bright green.
Remove the dish from the oven and let the pasta rest for about 5 minutes. The sauce will continue to thicken slightly as it cools. If it looks too thick, you can loosen it with a splash of warm broth or hot water and stir gently.
Taste and adjust seasoning with a bit more salt and pepper if needed. Sprinkle with a little extra grated Parmesan before serving,
