I just tried steel cut oats for the first time. I simmered them for 25 minutes like the directions said, but the liquid didn't cook off as much as I expected and they're still pretty crunchy/uncooked. They're not bad, but it wasn't the life-changing experience I was hoping for. Not sure they're worth the extra 20 minutes to cook. What did I do wrong?

And to reheat leftovers, would stovetop or oven be better? (I don't have a microwave).