Szechuan Green Bean Casserole

Preheat the oven to 450F. Mix together 1/4 cup flour, bread crumbs, and 1 tsp salt. Toss in the thinly sliced onions until lightly coated. Coat a baking pan with a bit of oil then evenly spread on the onions. Bake for approximately 20-30 mins until onions are browned. Toss half way through. Set to the side. Decrease the oven to 400F. Stir fry the string beans in few tbsp of oil until skin is blistered. Set to the side while making the beef. Brown the beef, then add in the ginger, garlic, chilis, and peppercorns. Add in the dou ban jiang, 1 tbsp of soy sauce, and 1/2 cup of water. Next add in the mushrooms and cook until they soften ~3 minutes. Sprinkle in 2 tbsp of flour and 1 tsp of dark soy sauce. Once the flour forms a paste, slowly stream in 1/2 cup of heavy cream. Cook until mixture thickens ~3-5 mins. Place in baking dish, top with crispy onions, and bake at 400F for another 15 minutes.