INGREDIENTS
3 cloves
Garlic
1/2 cup
Green onions
1 12 ounce package
Spinach, frozen dry
5
Eggs, large
1 tsp
Dijon mustard
1
Kosher salt and freshly ground black pepper
1/4 tsp
Nutmeg, ground
6 cups
Challah bread
3 tbsp
Butter, unsalted
3/4 cup
Gruyere cheese
1/4 cup
Parmesan cheese
3/4 cup
Swiss cheese
1 1/4 cups
Whole milk