I had never heard of a pierogie board, but my neighbour's wife, who is of Ukrainian descent, asked me last year if I could make one. She showed me a picture, and I slowly got started on it. You wouldn't think it would take that long, but with work, other projects, winter, health issues and necessities for SWMBO, as well as my inexperience with rabbett joints, I wrapped it up today, finished it with mineral oil, and took it over to her. She was over the Moon about it. Thinks it's wonderful. Her husband says that I got more hugs and kisses from her than he'd had all week. Anyway, next time I have to make a rabbett joint, it will go quickly. I have a feeling some of her relatives are going to ask me for one.
The board is a birch panel that I purchased ready made. The cleats at the end, which keep the board against the counter, are cherry.Glued together, no hardware.
Lessons learned: use a good router bit, not a cheap one; think really hard about the reason the joint isn't fitting, it may not be what you assume is wrong; relax, you can do it over if it doesn't come out right the first time.