How do you serve a side of mustard?

Serving a side of mustard in a small dish is the preferred method because it allows diners to use as much or as little mustard as they desire without overwhelming their dish. This approach maintains the integrity of the main dish and allows for customization, which enhances the overall dining experience. Additionally, presenting mustard in a small dish can also contribute to a more aesthetically pleasing plate, keeping the focus on the featured items while still offering a condiment. This method respects the dining etiquette by ensuring that condiments are neatly served and easily accessible.