Slow Cooker

A slow cooker, also known as a crock-pot, is a countertop electrical cooking appliance used to simmer at a lower temperature than other cooking methods, such as baking, boiling, and frying.

This facilitates unattended cooking for many hours of dishes that would otherwise be boiled: pot roast, soups, stews and other dishes.

A wide variety of dishes can be prepared in slow cookers, including ones typically made quickly, such as cocoa and bread.

https://en.wikipedia.org/wiki/Slow_cooker