This is a test of commonsense. Complete the next sentence:

How to make pan bagnat
Start by cutting a pocket into the bread roll.
For large round or viennese rolls, the bread centre is often removed to make room for the fillings, but many light white bread rolls such as vietnamese rolls or flat rolls such as ciabatta its not essential.
Mix the minced garlic, oil, vinegar and mustard.
Whisk lightly to make a vinaigrette, add salt and pepper to taste. Layer your desired fillings into the bread roll.