Bullock's Tea Room was noted for their delicious and very popular popovers. They are easy to make. The secret is to place the custard cups far apart enough on the baking sheet so that all sides of each popover get the same blast of heat needed to rise evenly. Muffin tins don't work well with popovers. This recipe makes a high-rising puffy popover, that can be served at any meal of the day.