Well, My first question is why are you greasing a roasting pan ?
Best bet is to fry them in a pan.
If you're roasting much above 350 degrees, it's not unusual. Any splatters of grease on the roasting pan or the over may smoke when you use the higher temperatures. Even when the oven isn't over 350, popping grease may hit the heating element and cause some smoke.
You fry it in a pan on high until done and drain the excess grease.
To use a roasting pan effectively for cooking, preheat the oven to the desired temperature, place the roasting pan in the oven to heat up, season the meat or vegetables, place them in the hot roasting pan, and cook until done, basting occasionally for added flavor and moisture.
The best type of pan to use for roasting a Thanksgiving turkey is a heavy-duty roasting pan with a rack. This type of pan allows for even cooking and helps to prevent the turkey from sticking to the bottom of the pan.
An average small roasting pan is about 16.5" long, 12.5" wide, and 2.5" deep. This is an example from Amazon: http://www.amazon.com/KittAmor-80109-Small-Roasting-Pan/dp/B001F7ASYK
For meat, an internal temperature of 165 degrees is required to kill pathogens.
glass pan
The equipment typically used for roasting includes an oven, a roasting pan, and a meat thermometer.
Roasting times for beef. Preheat your oven to 160°C (325°F) and use these cooking times to prepare a roast that's moist, tender and delicious.Your roast should be covered with foil for the first half of the roasting time. 5 to 7 lb Joint 2 to 2½ hours The Beef can be taken out sooner if you prefer rare (bloody) meat. Tips for a better roast. For extra flavour you can add optional vegetables such as carrots, parsnips, onions and celery to your roasting pan, and roast the meat 'on a bed' of veg. The veg also helps to keep the roast off the bottom of the roasting pan so it doesn't 'stew' in its own juices.
chicken, lamb beef
For roasting a 20-pound turkey, you should use a large roasting pan that is at least 16 inches in length and 13 inches in width.