~They smell SO heavenly when they are roasting~
I put Green Coffee Beans in a cast iron pan and roast them either over a camp cookstove or an open firepit. (The smoke is intense and gives my family a headache.) I cover my beans and it gives them a smokier taste. However, you can leave them uncovered if you are outside and they will taste "cleaner."
Keep roasting until they are not quite as dark as you like. Note: stop before you think they are done because they will keep roasting after you take them off the heat.