1 demi-baguette
5 slices roast beef
2 slices fresh tomato, halved
3 leaves lettuce, ends trimmed
1 slice red onion, separated in half-moons
Horseradish spread, recipe below
For the Horseradish Spread:
2 tbs prepared horseradish
1 tbs Dijon mustard
2 tbs Sour cream
Salt and pepper, to taste