Pork Jambalaya, when I make shrimp jambalaya for 100 people, I use about 13 pounds of shrimp, 18 pounds of ham, 11 pounds of rice, 15 pounds onions, 2 pounds each celery and bell peppers, plus the seasonings, This should help you multiply your recipe.

Maybe a meatless stuffed pepper with rice and veggies would be a meatless entree alternative that would go along with this meal? I would do about 2 dozen.

corn, 60 pounds
cole slaw, 7 gallons
bread, 32 pounds, 6-7 pounds butter
Adding a colorful second veg, same amount as the corn, would be a good idea

These would be in 2-3 appetizer areas, ready as guests arrive, to allow time to set up the final touches on the dinner, do wedding photos, etc.
fruit trays, 2 of the deluxe tropical tray for 100 on the fruit tray page
vegetable trays, use the veggie tray page, but consider doing 2 classic relish trays and finger veggies for just 150.
cheese trays, about 20 pounds assorted, some can be spreads or logs
crackers, 15-18 pounds
meatballs, 25 pounds, 3 quarts sauce per 10 pounds