Which of the following dishes can be customized with extra toppings?

The Margherita pizza is indeed the dish that can be customized with extra toppings. This is because pizzas generally serve as a base for various additional ingredients, allowing customers to personalize their meal according to their preferences. Common toppings that can be added on a Margherita pizza might include items like additional cheese, vegetables, meats, or spices, enhancing both flavor and texture.

In contrast, the other dishes mentioned typically come as is and have a more fixed composition. Guacamole and chips are usually served with a set portion of guacamole, while Buffalo cauliflower is generally presented in its standard format with a specific sauce. Crispy tenders, while they can have sauces added, do not typically offer a customizable topping option in the same way that pizza does. Thus, Margherita pizza stands out as the best choice for customization in terms of additional toppings.