The Best Roast Beef Sandwich, made with leftover roast beef or deli sliced, lettuce, tomato, cheese, caramelized onions and our own special mayo!
These sandwiches never disappoint. If you can get a jar of caramelized onions grab one and see how delicious the sandwich turns out! If not just use regular onions and you will still enjoy every bite! The last question is to toast or not to toast.
Ingredients for The Best Roast Beef Sandwich
- buns, split
- roast beef, leftover or deli sliced
- butter
- lettuce
- tomato
- caramelized onions or regular onions
- cheese
Ingredients for Honey Mustard Mayonaise
- honey
- mustard
- mayo
How to make Honey Mustard Mayonaise
Combine mayonnaise, honey and mustard in a small bowl.
Adjust amount of honey and mustard until the sauce is just the way you like it.
Refrigerate until ready to use.
How to make The Best Roast Beef Sandwich
Not toasted
To toast, or not to toast. That is the question. We generally do not toast these sandwiches. We love them served on a fresh bun.
Split your bun into 2 pieces.
Butter if desired.
Place roast beef slices on bottom half of bun, as much or as little as you like.
Next, lift up half of your roast beef and place your lettuce leaves in between.
Place remaining roast beef on top of your lettuce.
Next, cover the roast beef with tomato slices and then caramelized or regular onions.
Grab the top half of your bun.
Lay a couple slices of cheese on top of it.
Remove honey mustard mayo from fridge and smear it on top of the cheese.
Place top half of bun quickly on top of tomato slices.
There you have it the perfect roast beef sandwich!
Serve extra sauce with sandwich for dipping if desired.
Toasted
To enjoy your sandwich toasted we recommend turning your oven up to broil.
Split your bun place both halves, side by each, on a rimmed baking sheet.
Broil until bun surfaces are brown.
Then remove the bun from the oven and place cheese on the top half and return the top half back into the oven.
Place the bottom half of the bun at your workstation.
Butter if desired.
Place roast beef slices on top, as much or as little as you like.
Next, lift up half of your roast beef and place your lettuce leaves in between.
Place remaining roast beef on top of your lettuce.
Next, cover the roast beef with tomato slices and then caramelized or regular onions.
Check the oven for the top half of your bun to make sure the cheese is melted.
Remove from oven when cheese is melted or browned to your desired liking.
Smear some honey mustard mayo on the sandwich.
Grab the top half of your bun and place it on top of your tomato slices.
There you have it the perfect toasted roast beef sandwich!
Serve extra sauce with sandwich for dipping if desired.
More Easy Lunches To Try
Cheesy Honey Mustard Turkey Roll Ups
Cheesy Chicken Bacon Ranch Pinwheels
Easy Baked Ham and Cheese Pinwheels
Easy Crispy Chicken Salsa Wraps
Easy Chicken Salad Snack Wraps
Easy Smoked Salmon Tortilla Roll Ups
The Best Toasted Reuben Sandwich
The Best Roast Beef Sandwich
The Best Roast Beef Sandwich, made with leftover roast beef or deli sliced, lettuce, tomato, cheese, caramelized onions and our own special mayo!
Ingredients
- 1 buns, your favorite kind, split
- butter - optional
- 4-6 slices roast beef
- 2 leaves lettuce, any variety
- 2-4 slices tomato
- 3-5 spoonfuls caramelized onions or regular onion, sliced
- 2-3 slices cheese, sliced, any variety
Honey Mustard Mayonaise
- 2 tablespoons honey -
- 2 tablespoons mustard, any variety we used dijon
- 1/4 cup mayonaise -
Instructions
-
Combine mayonnaise, honey and mustard in a small bowl. Adjust amount of honey and mustard until the sauce is just the way you like it. Refrigerate until ready to use.
-
To toast, or not to toast. That is the question. We generally do not toast these sandwiches. We love them served on a fresh bun. If you want to toast your bun skip to the next step. Split your bun into 2 pieces. Butter if desired. Place roast beef slices on bottom half of bun, as much or as little as you like. Next, lift up half of your roast beef and place your lettuce leaves in between. Place remaining roast beef on top of your lettuce. Next, cover the roast beef with tomato slices and then caramelized or regular onions. Grab the top half of your bun. Lay a couple slices of cheese on top of it. Remove sauce from fridge and smear it on top of the cheese. Place top half of bun quickly on top of tomato slices. There you have it the perfect roast beef sandwich! Serve extra sauce with sandwich for dipping if desired. Enjoy!
-
To enjoy your sandwich toasted we recommend turning your oven up to broil and after splitting your bun place both halves, side by each, on a rimmed baking sheet. Broil until bun surfaces are brown. Then remove the bun from the oven and place cheese on the top half and return the top half back into the oven. Place the bottom half of the bun at your workstation. Butter if desired. Smear some honey mustard mayonaise on top of the bottom half. Place roast beef slices on top, as much or as little as you like. Next, lift up half of your roast beef and place your lettuce leaves in between. Place remaining roast beef on top of your lettuce. Next, cover the roast beef with tomato slices and then caramelized or regular onions. Check the oven for the top half of your bun to make sure the cheese is melted. Remove from oven when cheese is melted or browned to your desired liking. Grab the top half of your bun and place it on top of your tomato slices. There you have it the perfect roast beef sandwich! Serve extra sauce with sandwich for dipping if desired. Enjoy!
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