In saucepan, add milk, water, and salt.
Bring to a gentle simmer over medium heat.
Stir often to avoid milk sticking or boiling.
Add pastina slowly, stirring gently to prevent lumps.
Lower heat to medium-low once it begins cooking.
Stir frequently to create a creamy, smooth base.
After 5 minutes, add butter and grated cheese.
Keep stirring until cheese and butter fully melt.
Add black pepper and adjust salt as needed.
Remove from heat once thick and creamy throughout.
Serve hot with parsley and more cheese sprinkled.