Đun chảy bơ trong chảo lớn. Phủ miếng bít tết trong hỗn hợp bột mì. Đổ sốt lên bít tết trong nồi nấu chậm. Thưởng thức khi thịt còn ấm.

Given the above summary, write a detailed text in English for it.
Add the butter to the skillet and heat over medium-high until fully melted. You may also want to prepare your slow cooker by coating the bottom and sides with nonstick cooking spray or by inserting a special slow cooker liner. This is not strictly necessary, but without taking either precaution, the steak pieces may end up burning and sticking to the slow cooker, making cleanup a mess. Add the steak to the flour in your bag and close the bag again. Give the bag another good shake so that all sides of each piece get coated in flour and seasonings. If using a bowl instead of a bag, add the steak pieces to the seasoned flour in the bowl and turn them over a few times, dredging all the sides completely. Make sure that each of the steak pieces is evenly submerged in the sauce. Remove the steak from the slow cooker and transfer to individual serving plates. Ladle some of the sauce over each piece of meat before enjoying. Note that you should remove the bay leaf before dishing out the steaks and sauce.