Step 1

Set a rack inside a rimmed baking sheet and set aside. Make the rub. Peel and crush the garlic cloves and add them to the bowl of a mortar and pestle. Add the salt and pound the mixture into a paste. Stir in the herbes de Provence and the oil and grind the mixture together with the pestle. If you don’t have a mortar and pestle, you can use a food processor or finely mince the garlic, sprinkle the salt over it, and alternately chop and smash the mixture with the side of your knife until it forms a paste. Then transfer to a small bowl and stir in the remaining ingredients.

Step 2

Remove steak from packaging and pat dry. Score the fat cap—cut diagonal lines across the surface of the fat in both directions so you have a cross-hatched pattern. Take care not to cut down into the roast itself. Rub the meat all over with the rub. Let the meat sit for 30 to 60 minutes to take the chill off and absorb the flavors of the rub.

Step 3

When you’re ready to cook, heat the oven to 375°F. Place a large cast-iron skillet over medium-high heat and add enough avocado oil (or another oil with a high smoke point) to coat the bottom of the pan. Place the meat, fat cap side down, in the pan and sear for about 3 minutes. Flip and sear on the other side for an additional 3 minutes.

Step 4

Transfer the roast to the prepared baking sheet and place in oven. Roast for about 20 minutes per pound, or until an instant-read meat thermometer registers 140°F. Remove from oven and rest for at least 20 minutes before slicing and serving.