Requirements for a Good Chef
Quality control of food

A good chef should be able to explain what his/her methods are for controlling food quality and determining whether the price is appropriate for the quality delivered.

Inventory control

A good chef should have an understanding of the inventory required to serve the expected guests. He/she should be able to talk about methods how to make sure that you don't run out of items you need or throw too much food away.

Menu price

A good chef should be able to calculate the price for a menu.

Composition

A good chef has a thorough understanding that the eye is as important as the tongue, when serving meals.

Food safety
A good chef knows that food safety comes before profit. You could try this with a trick question like:"You have made the last four Kobe beef steaks for four guests, but the waiter dropped the plates just before leaving the kitchen. How do you save the situation?"