Combine all of the above marinade ingredients into a bowl and whisk until blended.
Place the filets in a glass dish or plastic bag.
Thoroughly cover the filets with the marinade, cover tightly and refrigerate overnight.
Return to room temperature to cook.
Preheat oven to 400 degrees.
Heat a cast-iron fry pan to hot and sear filets well on both sides.
Pour remaining marinade over steaks and place fry pan in oven.
Check “doneness” after 8 minutes and decide. Serve on warm plates.