Stabilize your Kamado Joe Classic III Ceramic Charcoal grill at 450ºF - 500ºF. Bank your coals to one side of the grill and top with a grill grate at the lowest setting of the divide and conquer system. On the other side, place a deflector shield and top with a grill grate at the highest setting creating a 2 zone system.
Trim any visible silver skin from the surface of the tenderloin. Season the tenderloin with the Cattleman’s Grill Steakhouse Seasoning and the Cattleman’s Grill California Tri-Tip Seasoning.
Combine the ingredients for the quick marinade in a bowl to create the herb garlic mustard paint. Paint the mixture evenly on the tenderloin.
Season the lower grill grate with a touch of oil and place the quick marinated tenderloins on the grill grate. Sear evenly and continue to dry baste with seasoning as needed. Once you like the bark, graduate it to the indirect side. Paint with another layer of the mustard paint. Close the dome and cook for a few more minutes then flip and cook until your reach an internal temp of 140ºF - 145F.