In a bowl or using a stand mixer combine flour and milk and stir to combine to make your batter.
Line a bowl with plastic wrap and place the Arby's roast beef sandwich in the bowl.
Lightly pour the batter over the roast beef sandwich until it's covered completely and press the Curly Fries into the batter surrounding the entire sandwich.
Wrap the sandwich tightly in the plastic wrap and then again in aluminum foil and freeze for two hours.
Heat oil in deep fryer or heavy skillet to 375°F.
Remove the aluminum foil and plastic wrap from the sandwich and fry for 5 minutes or until golden brown. The cooking time will vary depending on how frozen it is, so just make sure you fry it until the sandwich is heated all the way through.
Cool on a paper towel and serve with Arby's Sauce or your preferred dipping sauce.
