Prime Rib in the Dutch (Dutch Oven)

Per dutch oven. Scale per dutch, not per person.

Place 1/4 inch of rock salt in the bottom of a 14 inch dutch. Then place the roast on top of the salt and cover the entire roast with the remaining salt. Cook with 7 briquettes on the bottom and 20 on top. Pull roast out of the dutch when it reaches 135 degrees, usually about 1 hour for a 5-7 lbs roast.
NOTE: you want about 1lb of roast per adult so on a large trip 2, 3, or even 4 dutch ovens might be needed.