Special dishes can be known as dishes for a particular set of pple. It is determined mostly due to health challenges.
A diabetic patient can't eat what a non diabetic should eat and a vegetarian dsnt eat all meals. Some of the religious and traditional believes also contribute to this food selections and lots more. We must be concious of this and know our place.
Most people just grow up having allergies to some meals. But even if its so we must endevour to eat healthy.