Raw isn't wrong, when you're talking about beef al carpaccio. Lemon naturally "cooks" the beef in about 2 hours. Shave the tenderloin as thin as a slice of prosciutto for an elegant meal that will have everyone talking.
For 4 people
Put the thinly sliced raw meet in a deep plate and cover with the juice of 3 lemons.
Let it stay for 2 hours.
Remove it from the plate and display it in a large plate.
Cover the sliced beef with arucola.
Pour on top of it a lemon juice from 1/2 lemon.
Add olive oil, salt, pepper (just a bit).
Cut the Parmigiano Reggiano into chips and flakes and sprinkle it on top of the salad.
No cooking needed