Melt butter in a saucepan over medium heat.
Add minced garlic and sauté until fragrant.
Pour in the heavy cream and bring to a gentle simmer.
Stir continuously to prevent burning.
Gradually add the grated Parmesan cheese.
Whisk until the cheese is fully melted and the sauce is smooth.
Season with salt, pepper, and nutmeg, if using.
Remove from heat and let the sauce thicken slightly.
Toss with cooked pasta of your choice.
Garnish with fresh parsley before serving.