Rinse the spinach under cold water and remove any tough stems.
In a large pot, bring water to a boil and blanch the spinach for 2 minutes.
Drain the spinach and immediately transfer it to a bowl of ice water to stop cooking.
Once cooled, squeeze out excess water and chop the spinach coarsely.
In a skillet, melt the butter over medium heat.
Add minced garlic and sauté for 1 minute until fragrant.
Stir in the heavy cream and bring to a gentle simmer.
Add the chopped spinach to the skillet, mixing well.
Stir in the cream cheese and Parmesan until melted and smooth.
Season with salt, pepper, and nutmeg to taste before serving.