Rare Roast Beef Sandwiches

From the High Tea menu...

These versatile roast beef sandwiches are perfect for a work lunch-box or on a party platter.

Makes
12 triangles

Ingredients (serves 8):
3 teaspoons horseradish (see note)
1 1/2 tablespoons sour cream
1/4 teaspoon dijon mustard
1 teaspoon finely chopped fresh chives
6 slices light rye bread
80g shaved rare roast beef
45g snow pea sprouts, trimmed

Method:
Place horseradish, sour cream, mustard and chives in a small bowl. Season with salt and pepper. Stir to combine.
Lightly spread 1 side of each bread slice with horseradish mixture. Top 3 slices with roast beef and snow pea sprouts. Sandwich with remaining slices. Using a serrated knife, remove crusts. Cut each sandwich into 4 triangles. Serve.