Final product! You shove cut stuff into the bowl (I tend to cut right to left). then you can take the bowl to wherever you're cooking and then brush the trash into the (soon to be plastic-lined) drawer, for easy transport to the trash.
Since I wanted to inset the bowl so that it was even with the surface, I could not make a replaceable cover for the hole, though I had considered it. Maybe if you're better with a router, or you didn't want the bowl to be even with the surface, you could do that.
Don't forget to oil the surface with mineral oil! The surface is not prepared for cooking when you get it. Oiling the surface should help prevent staining and from food juices getting into the wood and going rancid. I have not had any problems with staining, even from beets (and I did not have to scrub too much to get that out)! I almost never cook meat, so I don't know how it fares with that. I would never cook meat on wood anyway, only plastic.