This barbecued roast beef on a bun recipe is perfect for a quick and delicious meal. The smoky flavor from the grill combined with the tangy barbecue sauce creates a mouthwatering sandwich that is sure to satisfy your taste buds. Whether you're hosting a summer cookout or just looking for a simple dinner idea, this recipe is a great choice.
If you don't usually have roast beef at home, you can find it in the deli section of your supermarket. Make sure to get it sliced thin for the best results. Additionally, barbecue sauce comes in many varieties, so choose one that suits your taste preferences, whether it's sweet, spicy, or smoky.

Ingredients for Barbecued Roast Beef on a Bun
Roast beef: Thinly sliced roast beef is the star of this recipe, providing a rich and savory flavor.
Buns: Split buns are used to hold the delicious roast beef and barbecue sauce.
Barbecue sauce: This adds a tangy and smoky flavor to the sandwich, tying all the elements together.
Technique Tip for This Recipe
To ensure the roast beef remains juicy and flavorful, avoid overcooking it on the grill. Instead, quickly sear each side for 3-4 minutes to heat through while maintaining its tenderness. For an added layer of flavor, lightly brush the buns with melted butter before toasting them on the grill. This will give them a rich, golden-brown crust that complements the barbecue sauce perfectly.
Suggested Side Dishes
Alternative Ingredients
sliced thin roast beef - Substitute with sliced turkey breast: Turkey breast provides a leaner alternative while still offering a similar texture and flavor profile.
sliced thin roast beef - Substitute with portobello mushrooms: For a vegetarian option, portobello mushrooms offer a meaty texture and can absorb the barbecue sauce well.
split buns - Substitute with whole wheat buns: Whole wheat buns add more fiber and nutrients, making the meal healthier.
split buns - Substitute with lettuce wraps: For a low-carb option, lettuce wraps can be used to hold the filling while adding a fresh crunch.
barbecue sauce - Substitute with teriyaki sauce: Teriyaki sauce provides a different but equally delicious flavor profile, with a sweet and savory taste.
barbecue sauce - Substitute with mustard sauce: Mustard sauce offers a tangy and slightly spicy alternative, which can complement the meat or vegetarian filling well.
Other Alternative Recipes Similar to This One
How to Store or Freeze This Dish
- Allow the roast beef to cool completely before storing. This helps prevent condensation, which can make the meat soggy.
- Place the cooled roast beef slices in an airtight container or wrap them tightly in aluminum foil or plastic wrap. Ensure there is minimal air inside to keep the meat fresh.
- Store the roast beef in the refrigerator if you plan to consume it within 3-4 days. For longer storage, place the wrapped meat in a freezer-safe bag or container and freeze for up to 2-3 months.
- To store the buns, wrap them individually in plastic wrap or aluminum foil to maintain their freshness. Place them in an airtight container or a resealable plastic bag. Store at room temperature for up to 2 days or freeze for up to 1 month.
- When ready to use, thaw the roast beef and buns in the refrigerator overnight. Reheat the roast beef by placing it in a preheated oven at 350°F (175°C) for about 10-15 minutes or until heated through.
- For a quicker option, reheat the roast beef in the microwave. Place the slices on a microwave-safe plate, cover with a damp paper towel, and heat on medium power for 1-2 minutes, checking frequently to avoid overcooking.
- Toast the thawed buns on a grill or in a toaster oven for a few minutes until they are golden brown and crispy.
- Assemble the sandwiches by placing the reheated roast beef on the toasted buns and topping with barbecue sauce. Enjoy your delicious barbecued roast beef on a bun!
How to Reheat Leftovers
Preheat your oven to 350°F. Wrap the roast beef sandwiches in aluminum foil to keep them moist. Place them on a baking sheet and heat for about 10-15 minutes, or until the meat is warmed through and the buns are toasty.
For a quicker method, use a microwave. Place the roast beef on a microwave-safe plate and cover it with a damp paper towel to retain moisture. Heat on medium power for 1-2 minutes, checking halfway to ensure it doesn't dry out. Toast the buns separately in a toaster or on a skillet until golden brown.
If you have a stovetop, use a skillet over medium heat. Add a splash of beef broth or water to the skillet to create steam, which helps keep the roast beef moist. Cover and heat for about 3-5 minutes, flipping halfway through. Toast the buns in the same skillet or separately.
For an air fryer, preheat it to 350°F. Wrap the roast beef sandwiches in aluminum foil and place them in the air fryer basket. Heat for about 5-7 minutes, checking halfway to ensure even heating. This method will give you a nice, crispy bun.
If you prefer a grill, preheat it to medium heat. Wrap the roast beef sandwiches in aluminum foil and place them on the grill. Heat for about 5-10 minutes, turning occasionally to ensure even warming. This method will give you a slightly smoky flavor, enhancing the barbecue sauce.
Best Tools for This Recipe
Grill: Used to cook the roast beef slices and toast the buns, providing a smoky flavor and grill marks.
Tongs: Essential for flipping the roast beef slices and buns on the grill without burning your hands.
Basting brush: Useful for applying barbecue sauce evenly on the roast beef.
Grill spatula: Helps in handling the buns and roast beef slices on the grill.
Cutting board: Provides a clean surface to place the grilled roast beef before assembling the sandwiches.
Knife: Handy for slicing the buns if they are not pre-split.
Serving platter: Ideal for arranging the assembled sandwiches before serving.
Meat thermometer: Optional, but useful to ensure the roast beef is heated to the desired temperature.
How to Save Time on This Recipe
Use pre-sliced roast beef: Save time by purchasing pre-sliced roast beef from the deli section.
Preheat the grill: Preheat your grill while you prepare other ingredients to speed up the cooking process.
Use store-bought barbecue sauce: Opt for a quality store-bought barbecue sauce to avoid making it from scratch.
Toast buns together: Toast all buns at once to save time.
Assemble quickly: Have all ingredients ready to assemble the sandwiches quickly once the beef and buns are done.

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