Set the filet mignon steaks out for them to get to room temperature. (will take about 15 minutes)

Preheat oven to 400 degrees.

In a small bowl, combine salt, pepper, garlic powder, paprika, onion powder and thyme.

Cover each steak side generously with the mixed seasonings. Sprinkle fresh rosemary onto each side as well. Press the seasonings into the steaks with your fingers.

Heat olive oil in a cast iron skillet, before it begins to smoke, add your steaks.

Cook steaks without moving for 5 minutes on each side.

Immediately transfer skillet to the oven and bake for 7-8 minutes for medium. The amount of time depends on how well done you like your steaks. See cook time chart below.

Remove from oven and transfer steaks to a plate and cover with foil. Let rest for 3-5 minutes before serving.