How to cook a restaurant style filet mignon steak

First, go to Bed Bath and Beyond and purchase a Gourmet Sous-vide water bath cooker ($99). Vacuum package your steak and put it in a large pot with water up to the indicator on the Sous-Vide cooker. Set the temperature to 133 degrees for med. rare and let it cook for 4 hours max.
After the four hours, turn your grill on as hot as it gets and quickly blacken the outside. The inside is already cooked through. The steak doesn't have to rest. Just enjoy the most tender steak you've ever had.
I sous-vide steaks a few days ahead of a party at different levels of doneness and store in fridge. About an hour ahead of the cooking, I throw the shrink wrapped steaks in a sink with very hot water for about 1/2 hour (not over 120 degrees). Then I can unpack the steaks at the same time and cook them all at once on a read hot grill. Everything is ready at the same time.