Place an oven rack in the lower third, and preheat oven to 275°F.
Place the roast on a rack standing in a roasting pan. Holding a blowtorch about 1 from the surface, pass the flame over the entire roast until the fat is lightly browned and smoking gently, and the meaty areas are just barely gray.
Season generously with salt and pepper, and place the pan in the oven with the meaty part towards the back. Cook until a thermometer reads 128°F in the center (about 2 hours; if you do not have a leave-in thermometer, begin checking at 90 minutes). Remove from oven and let rest, tented with foil, in a warm place, 30 minutes for medium-rare.
Meanwhile, whisk the cream and vinegar in a very cold bowl until it holds soft peaks. Whisk in horseradish, salt and pepper. (Unused cream will stay good, refrigerated in an airtight container, up to a week.).
Carve the meat off the bones. Cut between the bones and place them on a serving platter. Cut the roast in half through the center, place the cut sides down on a board, and carve into 1/2 thick slices. Arrange on the serving platter, sprinkle with grey salt or sea salt and black pepper, and serve with horseradish cream alongside.

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Nutrition Facts

Per Serving Per 100 g

Amount Per 1 Serving
Calories	1611.41 Kcal (6747 kJ)
Calories from fat	1012.9 Kcal
		% Daily Value*
Total Fat	112.54g	173%
Cholesterol	367.41mg	122%
Sodium	4514.58mg	188%
Potassium	25.97mg	1%
Total Carbs	65.04g	22%
Sugars	49.07g	196%
Dietary Fiber	0.26g	1%
Protein	81.87g	164%
Vitamin C	1.9mg	3%
Iron	10.2mg	57%
Calcium	264.8mg	26%

Amount Per 100 g
Calories	587.59 Kcal (2460 kJ)
Calories from fat	369.35 Kcal
		% Daily Value*
Total Fat	41.04g	173%
Cholesterol	133.97mg	122%
Sodium	1646.22mg	188%
Potassium	9.47mg	1%
Total Carbs	23.72g	22%
Sugars	17.89g	196%
Dietary Fiber	0.1g	1%
Protein	29.85g	164%
Vitamin C	0.7mg	3%
Iron	3.7mg	57%
Calcium	96.6mg	26%

* Percent Daily Values are based on a 2000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Find out how many calories should you eat.

Tastes

salty
savory
bitter
sweet

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