What about sausages??? Practically a meal in a tube. Add some peppers & onions, apples & cabbage, or beans & rice and you're good to go.
Or, I've tried smoked portobello mushrooms, those were good. Or twice baked potatoes. Cheese or veggie dishes cook quickly and readily pick up the smoke flavor.
If you want meat, stuffed peppers cook pretty quick. Fresh trout is also good, but I think it funks up the smoker.
I've even thrown the kids Jeno's pizzas on the WSM and had it turn out well. I think lasagna will be the next experiment. Just treat your smoker like an oven.