INSTRUCTIONS
[PREPARE THE ROAST]
1. Combine the parsley, thyme, rosemary, shallots, and olive oil in a small mixing bowl.
2. Place the roast in deep dish and rub the herb mixture all over it. Let the roast marinate in the refrigerator overnight.
3. Preheat the oven to 500°F
4. Place a rack in a roasting pan and place the roast, fat side up, on the rack. Roast for 15 minutes.
5. Reduce the oven temperature to 350°F, and roast for 1½ to 2 hours more, until a meat thermometer inserted in the center of the roast registers 140°F for rare (160°F for medium).
[PREPARE THE PANCAKES]
6. Heat a large nonstick sautee pan over medium heat. Combine all of the pancake ingredients in a large bowl and mix until smooth. Ladle ½ cup of the batter into the hot pan and cook for about 1 minute, until bubbles start to form. Flip the pancake and cook on the second side for another minute, until cooked through. Turn the pancake out onto a plate, cover loosely with a towel to keep warm, and continue with the remaining batter.
7. Remove the beef from the oven and let rest for 15 minutes. Cut the beef into 1 1/2-inch-thick slices.
8. Place the beef slices on the pancakes, garnish with the watercress, and serve with horseradish Sauce.