Baking scalloped potatoes at 275 °F instead of at 400 °F I have a single oven.  My ham needs to cook for 2 1/2 hours at 275 °F, my scalloped potatoes need to be cooked at 400 °F for 1 hour. 

Do I put both dishes in the oven at 275 °F and if yes, when do I take my potatoes out?
Timing can be more challenging than creating a meal itself. When this combo is part of a family gathering, I take timing out of the mix by baking the scalloped potatoes first, cover and set aside. Then do your ham. While the ham “rests”, to redistribute the juices, put the potatoes back in the oven, turn oven down to 300F &amp; warm them. Good luck!