Recipes: Slow-cooker falling-off-the-bone short ribs

Preparation:   Preparation time: 30 mins Cooking time: 10 hrs Serving: 8-10 Ingredients: 5 pounds beef short ribs Kosher salt and freshly ground black pepper 3 tablespoons dried thyme 2 tablespoons dried rosemary 1/4 cup ground porcini mushrooms/dried mushroom powder 1/4 cup all-purpose flour Olive oil 3 stalks celery, chopped...