Wash the spinach thoroughly and remove any tough stems.
In a large pot, bring water to a boil and add the spinach.
Blanch the spinach for 2-3 minutes until wilted, then drain and cool.
Chop the blanched spinach finely and set aside.
In a skillet, melt the butter over medium heat.
Add minced garlic and sauté for 1 minute until fragrant.
Pour in the heavy cream and bring to a simmer.
Stir in the chopped spinach and mix well.
Add Parmesan cheese, salt, pepper, and nutmeg, stirring until creamy.
Cook for an additional 2-3 minutes, then serve warm.