If you mean cooking for the guests, you don't have to do it yourself. There are friends who help you in the game. Friends have three positions: cook, waiter and cleaner. You can set their positions yourself. Click on them and a dialog box will pop up. There must be at least one chef and one waiter. Then start the game. After you sit down, the chef will automatically cook for him, and the waiter will bring him the cooked dishes. You don't have to worry about it. Just give them some strength once in a while and don't let them die.

If it's an upgrade, here's a menu. Click, there is enough material to upgrade. The chef can cook all your promotional dishes, but you can't choose, hehe.

There are still some skills. Look online more by yourself.