Bring steaks to room temperature and cut potatoes into wedges. Season wedges with oil, paprika, garlic powder, salt, and pepper.
Preheat grill to 400°F. Grill potato wedges 20-25 minutes, turning occasionally until golden and crispy.
Season steaks with oil, salt, pepper, and garlic powder. Grill over high heat 4-5 minutes per side for medium-rare (130-135°F internal).
Rest steaks 10 minutes. Meanwhile, sauté shallot and garlic in 2 tbsp truffle ghee for 2 minutes.
Deglaze with wine, reduce by half. Add stock, mustard, Worcestershire, and thyme. Simmer 3-4 minutes.
Reduce heat, whisk in cream, simmer until thick. Finish with remaining truffle ghee and optional butter.
Slice steaks against grain, arrange over potato wedges on platter.
Drizzle sauce over steak and fries, garnish with fresh thyme and serve immediately.
Notes
- Soak potato wedges in cold water 30 minutes for extra crispiness
- Use instant-read thermometer for accurate steak doneness
- Black truffle ghee can be found at specialty stores or made at home
- Sauce can be made in cast iron skillet on grill for outdoor cooking