Step 1

Prep. Mix the mayo and horseradish and let it sit for at least 30 minutes during the cook.

Step 2

Trim excess fat and any silver skin from the roast. The fat does not penetrate the meat. Meat is 75% water and fat and water don't mix. And the fat blocks the rub and smoke from the meat. If your roast is funny shaped, tie it with butcher string to make it closer to uniform in thickness so it cooks uniformly. Now take a look at the meat and figure out which way the grain is running because when it is done, you will want to slice it across the grain to reduce the chewiness. It is easier to find the grain when the meat is raw.

Step 3

Dry brine the meat a day in advance if possible, 1/2 teaspoon of Morton Coarse Kosher Salt per pound of meat.

Step 4

Crust. Anytime before cooking, in a baking pan, wet the entire surface and coat it with the Cow Crust.

Step 5

Fire up. Set up your grill for 2-zone indirect heat and get the indirect side to about 225°F (107°C) with the lid down. On a smoker, set it up to cook at 225°F (107°C). I know this is a lot cooler than most restaurants cook at, but stick with me. This will make meat more tender than most restaurants. If you wish, throw some wood into your grill for smoke flavor. I recommend it.

Step 6

Cook. Place the meat in indirect heat, close the lid and check the color on the bottom after about 30 to 60 minutes. If it is different than the color on top, roll it over. The cooking time will depend on the temp and the thickness of the meat. Shoot for about 115°F (46°C) in the deepest part.

Step 7

Then move it over direct infrared heat to crisp up the crust, and roll it around every 5 minutes or so when the exterior gets deep mahogany. Don't burn it. Watch the temp in the center and remove the roast when it hits 125 to 130°F (52 to 54°C) for medium rare. This reverse sear method will give you much more even color inside the meat, and a crisper crust that if you sear first.

Step 8

Slice. Slice the meat thin across the grain for max tenderness. If you slice and the grain is running parallel to the slice, rotate the hunk and slice it across the grain. This is crucial! It may be hard to slice warm meat with a machine if you have one, so I slice mine by hand. Just shave it off. Don't try to make large complete slices. The thinner the better. After you slice it, you can throw a few slices back on the grill or in a pan for those who like it chewier and more well done.

Step 9

Serve. Mound it high on the roll, drizzle on some horsey sauce, and scatter a few thinly sliced onion rings on.