Allow the steaks to come to room temperature (important)
Wisk 2 T olive oil, cayenne pepper, paprika, pepper, salt, mustard powder, and garlic powder.
Prick steaks with a fork and rub them well with the paste. Let sit for 30 miniutes.
Heat your cast iron skillet med. hot and add the remaining 3 T of olive oil. When smoking, add 2 of the 4 steaks (all 4 if your skillet is large enough). Sear to desired doneness without burning the spices (turn down and cover if need be). I prefer a med steak instead of Jackie B.'s recommended rare.
Remove steaks from skillet with tongs and let rest.
add red wine, balsamic vinegar, and kitchen bouquet to skillet. Stir in mushrooms. Simmer until all is reduced somewhat, and hot.
Turn off heat and add butter.
Serve steaks with sauce over the top, some crusty bread, a small baked potato, and veggie of your choice if desired.