This heavy duty Asian Stovetop Casserole dish is made of special clay that can withstand direct heat from gas or electric appliances. It has a lovely black finish and a 2.5-quart capacity. By Helen Chen. Helen Chen is a widely acknowledged expert in Chinese cooking. She's an educator and cookbook author. In 2007 she created and developed Helen's Asian Kitchen, a line of high quality Asian kitchenware. Her pieces are a fusion of delicate Asian design and contemporary, high quality utility.