Green Bean Casserole with Wagyu Summer Sausage

Ingredients

• 8 oz. Lone Mountain Wagyu Summer Sausage, coarsely chopped
• 1 pound fresh green beans, stemmed
• 1 small onion, peeled and halved
• 1 cup buttermilk
• Salt and freshly ground black pepper
• 1 cup plus 2 tablespoons all purpose flour
• Vegetable oil
• 3 tablespoons butter
• 1 pound white button mushrooms, thinly sliced
• 2 cloves garlic, minced
• 1 ¼ cup chicken broth
• ½ cup heavy cream