How Do You Reheat Just in the Oven or in the Pot

Since January, every week David has endured one of these microwavable meals. They have ranged from spaghetti bolognese to macaroni and cheese lasagna. His usual lunches consist of either a homemade soup salad or sandwich. Do I grin and bear it as it is free? Or do I just get a new job? Working remotely is unfortunately not an option as he's contracted to work full-time in the office. Anyhow, would be wonderful, anonymous. Just... My advice is: "Just think that's such a car pal"