INGREDIENTS
3 tbsp
salted butter, softened
12
slices white bread
1/2 cup
butter, softened
8
-ounces sliced fresh mushrooms
2 cups
thinly sliced sweet onions
1 1/2 lb
Kielbasa sausage, sliced into bite-sized pieces
1 lb
grated cheddar cheese (Mexican shredded blend is good for this)
5
large eggs
2 1/2 cups
milk
1 tbsp
Dijon mustard
1 tsp
dry mustard
1 tsp
ground nutmeg
salt and pepper
2 tbsp
finely chopped fresh parsley