I am having my daughter's wedding (Luau) at my home Saturday. That's all a go. But the number coming to the brunch/gift opening Sunday has jumped to 30. I would like to make egg casserole, but can only fit 4 cake pans in oven. Can I put 9 X 13 pans in roaster ovens and cook them there? Or if I doulble recipes and put in deeper roasting pans in oven how would I adjust cooking times. Would they get done in center if deeper? Any other suggestions? Help! Tnx