A Huge pan for potato kugel kidush

 For oven heating: Put in a preheated oven at 170-180 degrees for about 20-25 minutes; For heating on a hotplate:
For Shabbat Eve, place on the hotplate on a second dish while it is hot for about 1-2 hours. For Shabbat morning, place a second dish high on the hotplate before placing the food on it, so it heats up, and then place the food about an hour before the meal