Get ready to elevate your sandwich game with this barbecued roast beef on a bun recipe. Perfect for a quick lunch or a casual dinner, this dish combines the smoky flavors of grilled roast beef with the tangy sweetness of barbecue sauce, all nestled in a perfectly toasted bun.
If you don't usually keep roast beef at home, you might need to visit the deli section of your supermarket. Make sure to ask for it to be sliced thin for the best texture in your sandwich. Additionally, choose a barbecue sauce that suits your taste, whether you prefer it sweet, spicy, or smoky.

Ingredients For Barbecued Roast Beef On A Bun
Roast beef: Thinly sliced, this will be the star of your sandwich, providing a rich, savory flavor.
Buns: Split and ready to be toasted, these will hold all the delicious components together.
Barbecue sauce: Adds a tangy, sweet, and smoky flavor that complements the roast beef perfectly.
Technique Tip for This Recipe
To enhance the flavor of your roast beef, consider marinating it in a mixture of olive oil, garlic, and herbs for at least an hour before grilling. This will infuse the meat with additional layers of taste and keep it moist. When grilling the buns, brush them lightly with butter or olive oil to achieve a golden, crispy texture. For a smoky twist, use a barbecue sauce with a hint of chipotle or smoked paprika.
Suggested Side Dishes
Alternative Ingredients
sliced thin roast beef - Substitute with sliced turkey breast: Turkey breast is lean and has a similar texture when sliced thin, making it a good alternative for those who prefer poultry.
sliced thin roast beef - Substitute with portobello mushrooms: For a vegetarian option, portobello mushrooms provide a meaty texture and can absorb flavors well.
split buns - Substitute with whole wheat buns: Whole wheat buns offer more fiber and nutrients, making them a healthier choice.
split buns - Substitute with lettuce wraps: For a low-carb option, lettuce wraps can hold the fillings while adding a fresh crunch.
barbecue sauce - Substitute with teriyaki sauce: Teriyaki sauce provides a sweet and savory flavor profile, offering a different but delicious twist.
barbecue sauce - Substitute with mustard sauce: Mustard sauce adds a tangy and slightly spicy flavor, which can complement the roast beef well.
Other Alternative Recipes Similar to This Dish
How to Store / Freeze This Recipe
- Allow the roast beef to cool completely before storing. This prevents condensation, which can make the meat soggy.
- Wrap each bun separately in aluminum foil or plastic wrap to maintain freshness and prevent them from drying out.
- Place the wrapped buns and roast beef slices in an airtight container or resealable plastic bag. This helps to keep out any unwanted odors and preserves the flavors.
- Store the container in the refrigerator if you plan to consume the sandwiches within 3-4 days. For longer storage, place the container in the freezer.
- When freezing, label the container with the date to keep track of how long it has been stored. The roast beef and buns can be frozen for up to 2 months.
- To reheat, thaw the roast beef and buns in the refrigerator overnight if frozen. This ensures even reheating and prevents the meat from becoming tough.
- Warm the roast beef slices in a skillet over medium heat or in the microwave until heated through. Avoid overcooking to maintain tenderness.
- Toast the buns lightly on a grill or in a toaster oven to restore their crispness.
- Assemble the sandwiches by placing the reheated roast beef on the toasted buns and topping with barbecue sauce. Enjoy your deliciously revived barbecued roast beef on a bun!
How to Reheat Leftovers
Oven Method: Preheat your oven to 350°F (175°C). Wrap each sandwich in aluminum foil to keep the bread from drying out. Place the wrapped sandwiches on a baking sheet and heat for about 10-15 minutes, or until the roast beef is warmed through.
Microwave Method: Place the sandwich on a microwave-safe plate. Cover it with a damp paper towel to retain moisture. Heat on medium power for 1-2 minutes, checking halfway through to ensure the roast beef is evenly heated.
Stovetop Method: Use a non-stick skillet over medium heat. Place the roast beef slices in the skillet and heat for 2-3 minutes, flipping occasionally. Toast the buns separately in the skillet for about 1 minute per side. Reassemble the sandwich and enjoy.
Toaster Oven Method: Preheat your toaster oven to 350°F (175°C). Wrap the sandwich in aluminum foil and place it in the toaster oven. Heat for about 10 minutes, or until the roast beef is warmed through.
Air Fryer Method: Preheat your air fryer to 320°F (160°C). Wrap the sandwich in aluminum foil and place it in the air fryer basket. Heat for 5-7 minutes, checking halfway through to ensure even heating.
Best Tools for This Recipe
Grill: Used to preheat to medium-high heat and cook the roast beef slices and buns.
Tongs: Essential for handling and flipping the roast beef slices on the grill.
Grill brush: Handy for cleaning the grill grates before and after cooking.
Basting brush: Useful for applying barbecue sauce to the roast beef if desired.
Cutting board: Provides a clean surface to place the grilled buns and roast beef before assembling the sandwiches.
Knife: Necessary for slicing the buns if they are not pre-split.
Serving platter: Ideal for arranging the assembled sandwiches before serving.
How to Save Time on Making This Recipe
Pre-slice the buns: Save time by pre-slicing the buns before grilling. This ensures even toasting and quicker assembly.
Use pre-cooked roast beef: Opt for pre-cooked roast beef to cut down on cooking time. Simply heat it on the grill.
Preheat the grill: Make sure to preheat the grill to medium-high heat before starting. This ensures everything cooks quickly and evenly.
Organize ingredients: Arrange all ingredients near the grill for easy access. This minimizes the time spent running back and forth.
Use a brush for sauce: Apply barbecue sauce with a brush for even and quick distribution.

Barbecued Roast Beef on a Bun
Ingredients
Main Ingredients
- 1 lb Roast Beef sliced thin
- 4 Buns split
- 1 cup Barbecue Sauce
Instructions
- Preheat your grill to medium-high heat.
- Grill the buns until lightly toasted, about 1-2 minutes.
- Heat the roast beef slices on the grill for 2-3 minutes.
- Assemble the sandwiches by placing the roast beef on the buns and topping with barbecue sauce.
Nutritional Value
Keywords
Suggested Appetizers and Desserts for This Recipe
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