Chef Journal is your ultimate guide to your culinary journey. Chef Journal mainly consists of Chapters, Quests and Daily Tasks. You can find Chef Journal below the Player Profile image ( see reference image).
In Chapters, you can complete Quests which itself is a bunch of Tasks to win exciting rewards and earn Chef designation. Whereas Daily Quests are the best way to start a day in your Restaurant and also an easy way to earn Coins and Goodies.