The Absolute Best Roast Beef Sandwich

By Connie

Ingredients

• Ingredients:
• I made this sandwich on a panini press the day after a big family meal of filet mignon, but it is sooooo good even with deli-sliced beef. The horseradish sauce can be doubled or tripled and served with oven fries and steaks of any kind.
• HORSERADISH SAUCE:
• 1/2 cup good-quality sour cream
• 1 tablespoon prepared horseradish
• 2 tablespoons unsweetened all-natural applesauce
• 2 tablespoons panko or plain breadcrumbs
• 2 tablespoons finely chopped chives
• Salt and coarse black pepper
• SANDWICH FIXINS:
• 8 slices white or peasant bread from a large round loaf
• 8 slices rare roast beef or about 2/3 to 3/4 pound thinly sliced leftover steaks of any cut
• 1/4 cup minced red onion or 1 large shallot, finely chopped
• A handful flat-leaf parsley, very finely chopped
• 1 small red chile pepper, such as fresno or cherry, seeded and finely chopped
• Zest of 1 lemon
• 1 small bunch watercress—trimmed, cleaned and dried
• 1/2 pound brick of the sharpest white cheddar available to you, thinly sliced (it’ll be crumbly if it’s very sharp)

Details

Servings 4

Preparation

Step 1

Directions:

1.

Combine the sauce ingredients. Heat a panini press, cast-iron skillet or griddle over medium to medium-high heat.

On a work surface, spread the horseradish sauce liberally over 4 slices of bread. Arrange 2 slices of rare roast beef over the sauce. Combine the red onion (or shallot) with the parsley, chile pepper and lemon zest and sprinkle liberally over the roast beef. Arrange a layer of watercress over the beef. Divide the cheese evenly among the sandwiches and set the remaining bread slices in place. Press the panini 2 at a time on the panini press or in a hot skillet with a pan weighted on top.