I use a food processor to blend the oatmeal and chocolate chips (separately), then the butter mixture. It is quick!
Sometimes I substitute milk chocolate for the grated semi-sweet, it makes the cookies sweeter though, so be careful.
Seriously, don’t overbake these cookies. They won’t flatten out very much when they’re baked, so don’t expect them to. Try 8-9 minutes at first, and if you genuinely think they need more time, go for it. But they won’t.
I like to chop the pecans fairly fine so that they aren’t noticeable as huge nutty chunks in the cookies, but give more of a texture and overall flavor. Feel free to keep them chunky.