Well... the same way as we cook them - the oven or the stove. (or sometimes the toaster oven). And you know what?! Food and leftovers actually taste better. They even taste the same as when they were cooked in the first place.
Ever had microwaved leftover chicken? Yeah, gross! How do we cook sweet potatoes? In the oven. Yes, it takes a bit longer, but they taste SOOOO much better. I just try to plan meals better so I am making the most efficient use of my oven (like cooking meat and potatoes and veggies in there all together).
We weren't necessarily concerned about the harmful effects of microwaving food. It was more just a sense of simplification for us. Why keep another appliance that takes up valuable counter space if we really don't need it? We (okay, mostly I) have been trying to make an effort to simplify life and eliminate things we don't need, love, or are extremely useful, so not replacing the microwave seemed like a no brainer to me.
I am working on a plan for de-cluttering and simplifying in the new year and I plan to share it soon.... so stay tuned.....and Happy New Year!!!