All you need to do is place the item frame, put the food inside (Rotate it to what you want) And then place the iron pressure plate on the corner of the block. The only issue is if you step on the pressure plate after it permanently stays pressed by the item frame, so just don't step on your tables.
This works because Item frames only pop off when the block that's over them has collision. So pressure plates, Coral decor, torches, Snow layer, all of it can be placed on frames for more detail.
by 8mrjames