I'm making mac & cheese for an office Thanksgiving party. Unfortunately it's at noon and there are no ovens (only a microwave and little burners). I was planning on prepping the mac the night before, refrigerating over night, baking in the morning, and warming on the burners? Is it bad to leave a warm dish at room temp once i get to work? Should it go into the fridge? I'm worried it won't reheat enough on the burners if its cooled in the fridge. Help!!