When I replaced the intake/exhaust manifold on my wd45 I had one bolt that decided it didn't want to come out and broke off flush just like yours. I drilled and attempted to tap it out using heat and everything known to man. Ended up getting a drill bit just a bit smaller than the threaded hole size to drill out the bolt and then ran a correct size tap through what was left. Worked great. I used never seize on the new bolts when I reinstalled the new manifold.
Long answer but yes you can.