INGREDIENTS
1
medium white onion, peeled & chopped
2 tbsp
olive oil
1 13 ounce package
frozen baby peas
1/2 tsp
salt
1/2 tsp
pepper
4 1/2 cups
hot water
1 lb
ditalini or other small pasta
1/3 cup
freshly grated Parmesan cheese, plus more for serving
1/3 cup
freshly grated Romano cheese
red pepper flakes for serving (optional)