Does it need to be Kosher?
Even if it doesn't, it's still best to adhere to some of the Kosher tenets such as no shellfish, do not serve meat and dairy products together, do not serve dairy product after you've served meat products, and use Kosher salt.
Vegetarian meals are usually the best options as it will avoid most issues.
Pasta with Marinara or Alfredo sauce (no chicken)
Eggplant Parmesean (Marinara sauce)
Pirogi's (did I spell that right??)
Vegetable Stew
Roast Vegetables
Any of them can be served with a soup and salad starter