For the Sandwich:
1 Baguette cut into 4
Sliced cold brisket
Caramelized onions (onions cooked down for about half an hour with a little oil, sugar, salt, and pepper)
Spread the Aioli on both sides of the bread. Layer on the onions, tomato, brisket and lettuce.
1-2 Tablespoons freshly grated horseradish or prepared white horseradish (depends on how strong you want it)
1/3 cup mayonaise
1 Tbl lemon juice
1 big clove of garlic, minced
salt and pepper
Mix everything together and let it sit for about half an hour to let the flavors meld.
Think of this while your eating your matzah and cream cheese...