Once you’ve taken it out of the fridge, let your Rastelli filet mignon sit at room temperature for about 30 minutes so that it reaches equal temperature everywhere, which will help it cook evenly.
While the meat rests, about 10 minutes before you start cooking it, step 2 takes place. Here, you season your Rastelli filet mignon. Rub the seasonings into the meat.
Heat a heavy-bottomed skillet or oven-safe pan over hight heat. Don't place the meat on medium or low temperature because it won't cook properly.
Before popping the filet mignon in the skillet, add oil and butter. Allow them to homogenize, and, once the butter foam subsides, gently place the meat on the skillet.
Seat the filet mignon for two minutes per side, so four minutes in total. You will see a brown coating forming on each side, which is a sign you did a good job.
If you want your filet rare, this is where you finish cooking it. If you want a higher level of doneness, follow the next steps.
Preheat the oven to 425°F, i.e., 220°C.
Cook the filet mignon in the preheated oven for about 5-10 minutes, depending on your 1desired level of doneness.
The doneness level changes by the minute, so roast for about 6 minutes for medium-rare, about 7 minutes for medium, 8-9 minutes for medium-well, and 9-10 minutes for well-done.
After you take your Ratelli filet mignon out of the oven, let it rest on the counter for about 20 minutes.
Set the table, and enjoy a delicious meal!