What is slat for cooking?

"Slat" isn't a common term used in cooking. It's possible you're thinking of one of the following:

* Slats on a grill: These are the horizontal bars that hold the food above the heat source. They can be made of metal, ceramic, or wood.

* Slatted cooking rack: This is a rack with gaps between the bars, designed to allow air to circulate around the food while it cooks. It's often used for baking or roasting.

* Slate: This is a type of flat rock that can be used as a cutting board, serving platter, or even a cooking surface.

Could you provide more context or details about what you're looking for? This would help me understand and give you a more accurate answer.