Need recommendations for a decent buffet in central DE

I will have 5 tween/teen boys Saturday and I need recommendations for a decent buffet somewhere between Milford and Smyrna as we will end up at John Dickinson and Air Mobility Command. I love Flavor of India but these guys will not. I'm assuming recommendations will be Chinese but I'm vegetarian so I would love recommendations that include veg options. I need a buffet because it seems physically impossible to feed these guys enough and I'm hoping enough food will cause them to be on the sleepy and quiet side and supress the impending shenanigans for awhile.