I copied and pasted this I did a long time ago:
Pot RoastWhen I am asked what to cook first in a dutch oven, my answer is "Pot Roast" It is easy, and one can learn a lot from this simple item. Any size oven can be used, I like a 12 inch deep and recommend it as a first oven. A 5 pound roast fits well in the bottom and leaves plenty of room for vegetables. These pictures are of sirloin steaks and you will notice that I used a 12 inch shallow, I was the only one who was going to be eating it so I went that route. I had a refrigerator handy so I could store the leftovers to reheat the next day.
I like the meat to cover most of the bottom, this allows me to add the vegetables early on and when they sit on top of meat and out of the liquid, they don't get mushy. I often do this one while I don't have a lot of time to babysit the ovens, because with practice this one can go 2-3 hours with out being tended, if there is no danger of fire.
I take the oven and put in a small amount of lard, just enough to kind of cover the oven bottom. I then put this right on the fire and heat it to smoking hot. Be careful if you put the lid on it, till you get experience one could get it to hot and have a flash fire when you open the lid.
When the oven is hot and slightly smoking, I remove it from the fire to save the hair on my arms and just sear the meat away from the fire. A good sear with a lot of browning will really help the flavor of the meat. I salt and pepper the meat to taste at this time.
I also add enough water at this time to almost cover the meat.
One then adds the vegetables to the oven or once can cook the meat awhile and then add them later. I like mine well done, soft, but not mushy so I add them at the same time and just keep them on top of the meat. Onions are used all the time, garlic sometimes if I have it. The garlic is often dropped to the side in the liquid and the onions are sliced and put on the meat. This one used just carrots and potatoes, but often I use parsnips and turnips also and sometimes cabbage. I also season the vegetables some before cooking.
After the vegetables are added we're ready to cook or one can sear the meat, add liquid and set it on some coals to cook while one gets the vegetables ready.
Go over to your fire and get some coals out and spread them out on the ground, I like to start with an in to an inch and a half of them slightly larger than the oven. You then place the oven on top of these coals. The amount is not that critical, one will want to watch carefully the first to times anyway, this will get you the feel of it with your different kinds of wood.
When the oven is sitting on the coals, go back to the fire and get a good shovelful of them again and place them on the lid. After 15-20 minutes check it, things should be going well, but not at a full boiling, just a good simmer. When it starts cooling off one can add some more coals, but one won't need as many, just keep is cooking, adding liquid as needed. A slower cooking temp after getting hot in the first place will make the meat far more tender, also the acid in the onions will help.
The amount of time to cook will vary with the heat and the thickness of the meat and veggies. This took about 3 hours to cook, but a thicker post roast will be better if you give it 4-6 hours. Just before it is ready to serve, maybe 15-20 minutes, I like to brush off all the coals and ash off the top because they tend to insulate a bit. I Then get a lot of very hot coals and put them on top, this tends to brown the vegetables and put a slight crust on them.
And yes it was wonderful.