What is the best way to warm up your food at work?

Every morning I make breakfast, lunch, and snacks for my family and I throughout the day. I would like to know what are people's favorite methods of warming up their meals at work. <br><br>I have a convection toaster oven and I use meal prep containers and no matter what I do (I have tried everything from air frying the food to baking the food and even broiling the food) the food never seems to warm up properly and I am stressing myself out in the am. <br><br>Is a microwave the best way to heat up your meals at work? <br><br>Also, what are ways that you can prepare your food for meal prep without having to reheat it? I have been trying to find ways to make cold meals taste good but it seems like everything has to be warmed up to be enjoyed.<br><br>TL;DR - I need some advice on the best way to heat up my meals at work.