Allow beef to come up to room temperature. Place the beef on the enamel tray and rub with 2 tablespoons of olive oil and season with salt and pepper.
Place the enamel tray on the glass tray on the glass tray in the oven. Press the Auto/Roast pad six times, enter the weight 1000g and press Start. After cooking remove from the oven, place beef on a plate and allow to stand for 10 to 20 minutes.
While the beef is resting make the tonnato. Place the tonnato ingredients in a food processor or container of an immersion blender. Process or blend until smooth. Thin down with a little water if necessary.
To serve, thinly slice the beef and place on a serving platter. Top with dollops of tonnato, a drizzle of olive oil, salt, pepper, parsley leaves and capers.