The traditional power drill method.
How do you eat a bagel? By halving it with a serrated knife and then smearing cream cheese across the soft, flat innards with a butter knife? YOU'RE DOING IT WRONG, DUMMY!
Sorry. I don't mean to make you feel bad, but you're going to feel incredibly stupid for preparing your bagel in such an idiotic manner once you watch Murderbot Productions' instructional video of the proper, much-less-imbecilic way to prepare a bagel:
Mmmmmmmmm... Hungry much?!