Made with a garlicky horseradish sauce, sliced roast beef, melty provolone, arugula, sliced red onion, and roasted red pepper on a crunchy french baguette.
Mix mayonnaise, garlic, Dijon mustard, and horseradish. Adjust to taste.
Cut baguette lengthwise and spread sauce on both sides.
Fold roast beef and place on the bottom half of the bread. Top with provolone slices.
Broil or toast until cheese melts.
Layer arugula, red onion, and roasted red peppers. Add more sauce if desired, close the sandwich, slice, and serve.
Notes
As far as bread goes, for this recipe I used a large gluten free french baguette, but you can use whatever sounds good to you. Sliced sourdough, ciabatta, or even a sweeter bread like challah would work really well.
Use freshly sliced roast beef from your local deli or grocery store rather than pre-packaged if possible. Packaged roast beef is often covered in stabilizers and preservatives that can give it an odd texture and taste.