When certain food items are depicted in fiction they are almost always drawn or displayed in a particular way. Pizza is almost always pepperoni (which is occasionally paired with mushrooms), ice cream only seems to come in three flavors (vanilla, chocolate, strawberry, and sometimes all three at the same time), and pasta is usually represented by spaghetti and meatballs. One reason for this is that it's easier to go with what is perceived to be the most popular flavor as that makes the food item very easy to recognize. Another reason is that it's easier to stylize or simplify a food's design in animation than to depict it realistically.