You can use fresh, homemade, frozen, or gnocchi for this recipe.
You can use 2% milk or even half-and-half in place of the whole milk.
While I love nutmeg in a gratin dish, you can skip it if it’s not your thing.
Substitute the Parmesan with your favorite melting cheese, such as fontina, gruyere, or pecorino.
To prevent your sauce from separating, be sure to cook it over low and slow heat. Sudden changes in temperature can cause the emulsion to break.
If your sauce is too thick, add ¼-½ cup of milk and whisk until it reaches the desired consistency.
If your sauce is too thin, add ¼-½ cup of hot starchy water from the gnocchi pot and toss to combine.