My in-laws live in a 1920s bungalow in San Francisco. Mom-in-law has asked me to make her a new cutting board. The existing one is 2' wide, 20" long and 3/4" thick. It slides completely out of a slot in a kitchen cabinet. It looks like 2 - unfinished oak boards with a long grain stile on each side and a rail across the front. The two large boards are joined with what looks like tongue and groove. This joint leaves a shallow groove across the cutting board which catches crumbs and other food stuff. Attached is a crude drawing using Word. I need to practice with Sketchup.
I'm looking for some ideas on how to make a new one, possible in an edge grain style.