Easy to cook like this.

I would add some potatoes and not just eat the meat with excessive amounts of butter at the end!

Have regretted not doing this last few trips. But take a roast of venison, beef, feral goat, water buffalo or similar. Make the food as shown or similar. Dig a hole in the ground at lunch time. Throw some coals in the bottom of the hole. Put the camp oven in the hole on the coals. Throw some coals on top of the camp oven. And cover it all with sand ie fill up the hole. The coals keep warm, but are slowed down with little oxygen. Acts like a slow cooker.

Come back at the end of the day, uncover, and serve. Yum. A great dinner.