45 minutes total
Cook bean 3-4 minutes in boiling water - drain and set aside.
Combine crumbs, parsley, 1 TBL oil & 2 TBL cheese and set aside
Heat remaining oil in a cast iron skillet over medium heat. Sauté onions and mushrooms, stir in flour, add milk, chicken broth and sherry. Bring to a boil, add remaining ingredients, then stir in the beans. Top with crumb mixture and bake or broil until heated through and golden on top.