Step 1 : Introduction to the question "What is the main ingredient in Carpaccio?"
...The raw beef that is the main ingredient in Carpaccio needs to be very cold, or even slightly frozen, when prepared. The chef should slice the meat into the thinnest possible slices. True chefs will use a razor-sharp, long-bladed slicing knife - never a commercial slicer. The slices are then arranged in a single layer on a chilled plate. Drizzle the prepared sauce over the meat and serve the dish immediately. Source: Saveur.com