Thanks for all the info !
how about the right way to cook a Filet Mignon ?

Info much appreciated
Cheers
Filets have multiple ways to cook them...its too much to type, but if you are doing it indoors and have an oven handy that works pretty good for a beginner.
Google the following words "best way to cook a filet mignon" and you will see a youtube video titled "Filet Mignon Recipe"...should be #1 hit on the results.
That lady on the video has the right idea.
If you are cooking outside then its of course different and it requires a lot more attention.
I will give you a few tips in addition to what you see in the youtube movie.
Follow the directions used for the New York above regarding the pan and salt and pepper and oil and all that but your fire will be slightly lower than with the New York mainly because your meat is normally way thicker. You dont want it 'low' just lower than a 1 inch thick NY strip.
Although if you want to do a filet in a pan only with no oven you will need a lid.
Put the meat in a hot pan for 4 minutes with a slightly lower heat than the NY steak. Flip it over after the time expired and cover with the lid and wait.
With experience you will be able to feel the texture of the steak and tell how done it is merely by touch. But since you have not cooked 500 filets get yourself a probe thermometer.
Personally I use a probe thermometer with a long oven proof wire so I can monitor the temp. It works great and takes all the guess work out of the game.
If you are going to be cooking filets a lot its worth the $15 or $20 to get one. Same is true for any roast you plan to cook.
When it hits the right temp for your desired doneness then take it off the heat. Remember, anything you cook, say its 140 degrees F (I am american) after you take it off the stove it will continue to cook for at least 10 minutes and the temp can go up somtimes at least 20 more degrees.
You have to be real careful basically and not let it over cook regardless of the method. With filets the outside may look charred but the inside might still be cold and uncooked completely, hence the challenge of a filet.
A filet is really cooked like its half steak and half roast.
If I am roasting it or cooking it stovetop either one I can insert the probe thermometer and put it in the oven and still monitor it all the same because it has the long cord. it just has a long 3 foot oven and fire proof wire with a probe on the end attached to a little digital thermometer.
Don't mess with the filet until you get one of those thermometers.