Mix all of the ingredients for the marinade in a small bowl
Pat the steaks dry then coat the steaks with the marinade.
Add the steaks to a large bowl with a lid or a gallon-sized storage bag. Marinate the meat for at least 4 hours (preferably overnight).
Remove the steaks from the refrigerator about 30 minutes before cooking
Heat a cast iron grill pan over medium heat for 4 minutes
Wipe excess marinade from the steaks. Place two steaks at a time in the grill pan and cook for 5 minutes per side (or until they reach 145 degrees for Medium Well).
Allow the steaks to rest for 5 minutes before cutting into them.
Video
Notes
Marinating time: Refrigerate the steaks for at least 4 hours or up to overnight.
For better browning: Wipe away the excess yogurt marinade before cooking.
Steak thickness matters: Use steaks that are similar in thickness so they cook at about the same rate.
Check doneness: Use an instant-read thermometer rather than relying only on cooking time.
Discard used marinade: Do not reuse marinade that has been in contact with raw steak.