Green Bean Casserole

Name: Green Bean Casserole
Prep time: 45 min
Cook time: 20 min
Total time: 1 h 5 min
Ingredients: 1 lb. green beans, trimmed and cut into 1 inch pieces; Kosher salt and pepper, to taste; 2 Tbsp olive oil; 3 shallots, sliced; 4 garlic cloves, minced; 8 oz shitake mushrooms, stemmed and sliced; 4 Tbsp unsalted butter, plus more for buttering the dish; 3 Tbsp all purpose flour; 2 cups Thanksgiving Stock, or chicken stock of choice, room temperature; 1/2 cup grated pecorino romano cheese; 1/4 cup heavy cream; Sliced chives, for serving; Crispy fried shallots, for topping (see method below or Video here); Vegetable oil, for frying; 4 shallots, thinly sliced (on a mandolin if you have it!), all layers separated; 1/4 cup all purpose flour; Kosher salt