BEST EVER GREEN BEAN CASSEROLE recipes

Name: BEST-EVER GREEN BEAN CASSEROLE recipes
Ingredients: 2 medium onions, thinly sliced; 1/4 cup all-purpose flour; 2 tablespoons Japanese bread crumbs (a.k.a panko); 1 teaspoon kosher salt; 2 tablespoons kosher salt; 1 pound fresh green beans, rinsed, trimmed and halved; 2 tablespoons unsalted butter; 12 ounces button mushrooms; 1/2 teaspoon black pepper; 2 cloves garlic, minced; 1/2 teaspoon nutmeg, freshly ground; 2 tablespoons all-purpose flour; 1 cup half-and-half; 1 cup low-sodium chicken broth