INGREDIENTS
1 1/2 tbsp
butter
6 oz
button or cremini mushrooms, sliced
8
slices day-old sourdough bread, crusts trimmed, buttered, and cut into 1/2-inch cubes
12
to 16 oz. chicken sausage, cut into bite-sized pieces
2 cups
grated cheddar cheese
4
large eggs
2 cups
whole milk or half-and-half
1/2 tsp
salt
1/4 tsp
freshly ground pepper
1 tsp
dry mustard