Another idea would be a chafing dish filled with vegetable egg foo yung patties, with the sauce ladeled on by the servers.
If they eat dairy products, the greens and mozzarella casserole should work very well in a chafing dish (and can be multiplied for more servings), is to die for (as well as being low carb for those interested):
And the recipe below it, Broccoli Cornbread Casserole, has a very delicate, delicious flavor, and is quite pretty (at least in my opinion 
* Exported from MasterCook II *
GREENS & MOZZARELLA CASSEROLE
Recipe By : Unknown – Web
Serving Size : 6 Preparation Time :0:00
Categories : Casseroles & One-Dish Meals Cheese Dishes
Vegetarian
Amount Measure Ingredient – Preparation Method
1 1/2 lbs greens, washed & trimmed (kale, collards, – beet greens,
or any combination – I used spinach)
salt and freshly ground black pepper
1 cup chicken or vegetable broth
1 cup half and half
4 tablespoons butter or margarine
1/4 cup flour
1/2 cup grated parmesan cheese
1/2 cup ricotta cheese
3 tablespoons dry bread crumbs
2 ounces mozzarella cheese – shredded
Butter a 1 1/2-quart baking dish or casserole; preheat the oven to 375 degrees or 350 degrees for oven-proof glass.
Cut out and discard the tough stems; if using kale or collards, cut out thick center ribs. Rinse all the greens and shake off any excess water, chop them into 1/2-inch pieces. In a large skillet, cook the greens over low heat, adding them by handfuls and stirring them down as they wilt. Add 1/2 cup of water if the greens seem dry, then cover the skillet and braise for 10 to 15 minutes, or until tender. Pour off any liquid left in the skillet, then season the greens with salt and pepper. Transfer to a bowl and set aside.
Heat the broth and half-and-half in a saucepan, just until bubbles form around the edge of the pan. In a large skillet, melt the butter over low heat. Add the flour and cook, stirring, for one minute. Add the hot broth mixture all at once and stir over medium heat until the sauce is smooth and thickened. Whisk in the grated Parmesan and ricotta. Stir the greens into the cheese sauce and pour the mixture into the prepared baking dish. Sprinkle with the bread crumbs and then sprinkle the grated mozzarella over the top. Bake for 20 minutes, or until the sauce is bubbling and the mozzarella is melted and lightly browned. Serve immediately.
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* Exported from MasterCook II *
BROCCOLI CORNBREAD CASSEROLE
Recipe By : Adapted from Blessings Cookbook
Serving Size : 8 Preparation Time :0:00
Categories : Breads, Quick, Savory Breakfast/Brunch Dishes
Casseroles & One-Dish Meals Cheese Dishes
Bring-Alongs Vegetarian
Side Dishes
Amount Measure Ingredient – Preparation Method
2 boxes corn muffin mix
4 tablespoons butter or margarine – melted
4 eggs – beaten
1 medium onion – chopped fine
1 10-oz. pkg. frozen, chopped broccoli – thawed
2 cups cottage cheese
optional whole kernel corn, 1 or 2 tbs
sour cream
Preheat oven to 350. Grease 9x13" pan.
Mix all ingredients well and spread in pan. Bake 30 to 35 minutes.
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