INGREDIENTS
12 oz
Crimini or button mushrooms
8 oz
Spinach, fresh
1/3 cup
Sun-dried tomatoes
5
Eggs, large
1 tsp
Mustard powder
1/2 tsp
Black pepper
1/8 tsp
Cayenne pepper
3/4 tsp
Garlic salt
3/4 tsp
Kosher salt
4 cups
Stale italian or sourdough bread
1 tsp
Butter
1/2 cup
Gruyere cheese
1 1/2 cups
Milk
1/4 cup
Parmesan cheese