(Edited to remove Grandma's soup recipe, which was not what you wanted.) A reasonably easy thing to do involves preheating your oven to 350 or 375 degrees, rinsing the thighs, inserting a half-clove of garlic under the skin, rubbing each thigh with olive oil (OK, vegetable oil. I just like olive oil). putting them into a roasting pan, putting that in the oven, and baking around 45-60 minutes. Approximately. (Start checking after 40 minutes; sometime they cook quickly, sometimes they stubbornly refuse to be cooked unless totally dehydrated.)

Bon appetit!