Slow Roasted Hawley Ranch Leg of Lamb

We went to Laurelhurst Market to pick up our order that included a Hawley Ranch leg of lamb.  We thought we'd try roasting one.  Turned out to be a shade under 8 pounds without the shank.  Lucky us ordered it without the shank.  It would not have fit into our roasting pan or the oven!  Chuckle, chuckle.  We're still couple of novices trying out this and that.  Our expertise was eating out, but our combined allergies have finally put a kibash to enjoying other people's cooking (OPC).

Slow Roasted Hawley Ranch Leg of Lamb

1 Leg of Lamb (our's was a shade under 8 pound Hawley Ranch leg of lamb)
handful of fresh
marjoram
thyme
rosemary
chopped
1/4 cup California Olive Oil
salt & pepper optional
1 roasting pan with rack

Preheat oven to 250 degrees Fahrenheit.
Mix herbs with olive oil.
Coat the no fat side of the leg with herb mixture.
Place on rack fat side up and coat with rest of herb mixture.
Put into oven and roast for about 9 hours.  
We figured as follows:  
number of hours to roast = leg of lamb weight + 1 hour
weight of leg = approximately 8 pounds; therefore, 8 + 1 = 9 hours.