Hi Jen -- thanks for reading and sharing your thoughts!
Preparing a meal beforehand would definitely help with productivity, but I think your general idea of eating a larger, healthy meal is on the money.
In my experience, if you get proper nutrition during a 24-hour period (in my case, 3,500+ calories from whole, real foods) ... then you rarely have to worry that much about the timing. It's not necessarily skipping a meal, it's just "moving it back" to lunch and dinner.
Anyway, even if that doesn't sound appetizing to you, hopefully you found the other suggestions useful!