Remove the bones from your rib roast by cutting along the fat line as seen in the picture.
3 kg rib roast
Season your meat generously with salt on all sides.
⅓ cup salt
Place on a wire rack and let it dry brine in the fridge uncovered overnight. The color should become a darker red.
Optional but promotes even cooking - tie the rib roast up tightly using butchers twine.
Mix together rosemary, mustard, olive oil, garlic, and pepper. Spread that on our roast evenly.
¼ cup chopped rosemary, ⅓ cup dijon mustard, 2 tbsp olive oil, 4 cloves minced garlic, 1 tbsp black pepper
Place into an oven over a wire rack at 225F until the internal temperature reaches 120F. This 3kg roast took about 2 hours.
Remove and let the meat rest for at least 1 hour.
Once you are ready to serve, roast again at 500F in your oven for 8 minutes.
Mix together all your horseradish sauce ingredients into a bowl and serve with the prime rib.
¼ cup horseradish, ½ cup greek yogurt, ½ cup mayonaise, 2 tbsp lemon juice, ¼ cup water, 1 tbsp salt, 1 tbsp pepper, 1 handful chopped chives