If the hot dogs and pastry in the center are not fully cooked through, the dish needs to stay in the slow cooker a little longer. To try to keep cooking throughout the dish as even as possible, don't place more than 3 rows of dogs anywhere between a ramekin and a slow cooker sidewall. If you are using a bigger or rectangular-shaped slow cooker, you may need to use two ramekins as shown in the photo above.