One American man came to Tijuana, and went to a Mexican restaurant and asked for a real authentic Mexican dish
The waiter brought him a menu that listed Mexican dishes like burritos, tacos, carne asadas, huevos rancheros, Tomales, etc.
The American looked at it attentively and shook his head in dissatisfaction
"No. All of these I can eat in America. I want something really authentic."
"But, Senior, we really don't know what else we can offer you"
"How about those black spherical objects that this gentleman eats?" he pointed at the man at the other table who indeed ate some strange dish.
"Or, Senior, we cook that dish only once a day and you have to come early in the morning."
The next morning the American man came to the restaurant early and told the waiter :
"Bring me that dish we talked about yeaterday"
The waiter showed him the ok sign and in five minutes he brought him the dish.
"Now, wait a second!" the American man said with a hint of dissatisfaction "That's not fair! Yesterday, you gave the local boy the big balls and now you are giving me the little ones!"