To spice it up, use any rubs or spices. Today I did two turkey meat fatties with SM Cherry rub on the outside, and stuffed with mac n cheese. Then I used Oakridge Chicken and Pork Rub and stuffed that one with eggplant, pizza sauce and mozz cheese. Smoke 'em around 250*, took about 2.5 or so hours and they were ready for eating.
Oh and for the egg/bread crumb, I use about 1 egg and I guess 1/4 cup of bread crumbs per 1.3 lbs of turkey meat - our supermarket packages turkey meat in 1.3 lb boxes, so that is how I measure it out.