Add your coarse salt, peppercorns, dried garlic and red chili flakes to your mortar & pestle. Grind to your liking.
Lather your porterhouse steaks with canola oil and season thoroughly with the seasoning. Leave a little seasoning for your lobsters.
Preheat your grill for two-zone indirect cooking at 275-300F.
Add your steaks to the cool side of the grill to cook for about 1 hour.
As the steaks cook, butterfly your lobster tails, lightly score them, lather with oil and season with the leftover seasoning.
Place the lobster in the fridge until ready to use.
Once the steaks reach 120F internal for medium rare, pull them off and let them rest for 10 minutes.
Heat up your grill to high heat (around 400F). Add a cast iron skillet to preheat for 2 minutes.
Next, add the ingredient for the Horseradish Parmesan Butter sauce to melt. Once fully melted, pull off the grill and set aside.
When the steaks are 2-3 minutes away from being done resting, add your lobster tails to the cool side of the grill to cook for 5-7 minutes or until they are no longer translucent.
Add your steaks to the hot part of the grill to sear for 1-1.5 minutes per side in order to get grill marks.
Once the steaks and lobster are done, pull off and set for plating.
Top your steaks with the butter sauce, sliced into them, pour yourself some Buffalo Trace and enjoy!