01 -
3 tablespoons unsalted butter.
02 -
8 ounces mushrooms, sliced.
03 -
1 cup chopped onions.
04 -
2 tablespoons all-purpose flour.
05 -
1 cup milk (or half-and-half).
06 -
Freshly ground black pepper, to taste.
07 -
Kosher salt, to taste.
08 -
2 cups diced cooked potatoes.
09 -
2 cups diced cooked chicken.
10 -
1 cup soft breadcrumbs (optional).
11 -
2 tablespoons unsalted butter, melted (optional).
12 -
1 cup shredded cheddar cheese or Monterey Jack (optional).