Melt the butter in a medium saucepan over medium heat.
Add minced garlic and sauté for about 1 minute until fragrant.
Pour in the heavy cream, stirring continuously.
Bring the mixture to a gentle simmer, avoiding a boil.
Slowly whisk in the grated Parmesan cheese until melted and smooth.
Add salt and pepper to taste, and optional nutmeg for flavor.
Continue to cook for an additional 2-3 minutes until thickened.
Remove from heat and let it sit for a minute to thicken further.
Serve immediately over cooked pasta or use as desired.
Store any leftovers in an airtight container in the fridge.