1/2 cup finely chopped onion
A pinch plus 1 teaspoon kosher salt
1/4 cup all-purpose flour
3 cups beef broth
1/4 cup heavy cream
Tear the bread into pieces and place in a small mixing bowl along with the milk. Set aside.
In a 12-inch straight sided saute pan over medium heat, melt 1 tablespoon of the butter. Add the onion and a pinch of salt and sweat until the onions are soft. Remove from the heat and set aside.