Roast Beef Sandwich with Horseradish Sauce

Ingredients

• 1 tbsp. olive oil

• ½ red onion, sliced

• 1 ciabatta bun

• 4-5 slices roast beef

• ¼ cup arugula

• Horseradish sauce (recipe below)

Horseradish Sauce Ingredients

Makes 1 cup

• ½ cup sour cream

• ½ cup mayonnaise

• 2 tbsp. prepared horseradish

• 1 tbsp. lemon juice

• 1 tbsp. fresh dill, chopped

Directions

Serves 1

1. Make horseradish sauce by combining all ingredients in a bowl and mixing to combine.

2. In a small skillet, heat 1 tbsp. olive oil and add the red onion slices. Sauté the red onion until softened, about 8-10 minutes, and set aside.

3. Assemble sandwich: top ciabatta bun with roast beef, arugula, sautéed red onion, and prepared horseradish sauce.