Some people say you need to pre-sear your food before you cook them sous vide. Other people say to sear afterwards. Some say to do both. What's the right answer?
This is a great question and one that many people run into. I'll look at both sides of the question, whether to pre-sear and whether to post-sear. I'll start with the post-sear as it's the easiest to answer.
If you want good flavor and crust on your food, you will always want to sear it when it is done cooking. Even if you do a pre-sear, the crust itself will go away and can only be established by searing it after the sous vide process is over.