On the regular dining plan you are entitled to entree, dessert and a non-alcoholic beverage. You do not get an appetizer on the regular plan, even if the restaurant costs 2 credits. An exception is if you order from the prix fixe menu. If you order from that menu you can get an appetizer. No substitutions allowed on the prix fixe menu.
On the deluxe dining plan you are entitled to any appetizer, entree, dessert and a non-alcoholic beverage.