Let the filet mignon sit at room temperature for 15 to 20 minutes
Preheat the oven to 250°F to 275°F
Place the steak on a wire rack set over a baking sheet
Reheat until the internal temperature reaches 110°F to 120°F
Heat a skillet over medium-high heat with a little oil or butter
Sear the steak for 30 to 60 seconds per side
Remove from heat and let rest for 5 minutes
Use a meat thermometer to avoid overcooking
Reheat only once for best quality