01 -
5-6 medium-sized sweet potatoes.
02 -
3 tablespoons of unsalted butter.
03 -
2 diced large shallots.
04 -
6 minced garlic cloves.
05 -
1 tablespoon fresh rosemary.
06 -
1 tablespoon thyme, freshly chopped.
07 -
1½ cups shredded gruyere.
08 -
1½ cups grated parmesan.
09 -
3 tablespoons plain flour.
10 -
½ teaspoon white or black pepper.
11 -
1 tablespoon sea salt.
12 -
⅛ teaspoon of grated nutmeg.
13 -
2 cups whole milk.
14 -
1 cup heavy whipping cream.
15 -
Aluminum foil.