After a short battle with some bandits, I go to the Character screen to use the single skill point available. It’s time to activate the general skill, Gourmet, which is very useful if you’re playing on Death March difficulty. Why is it useful? Because it makes consumed food regenerate Geralt‘s vitality for 20 minutes. Since vitality isn’t regenerated by meditating on Death March, this is the best way of keeping Geralt‘s health up.
Video: Gourmet
The Witcher 3 Guide 