There's a lot to do in Clair Obscur: Expedition 33's open world that isn't immediately accessible, from secret areas to hidden endgame boss fights. One thing you can do, though, is hunt down some lost Gestral locations scattered across the map. You'll first have to reach Esquie's Nest in act one of the game's story, which is when you can meet Sastro—a Gestral wearing a chef's hat who hangs out in your camp.
Each Gestral you find for Sastro unlocks a new reward you can claim from him if you return to camp (by pressing G or down on a controller in the overworld). If you're struggling to find the Gestral chef, head left at the entrance to the clearing with The Curator, then take another left into a small clearing, though, as mentioned, he won't appear until after you meet Esquie. It's also possible he doesn't appear until you find the first lost Gestral out front of Esquie's Nest.
