Assemble all the biscuits like this then refrigerate for a few hours to set the ganache completely.
Your "BN style" biscuits are ready.
Remarks
You can add extra filling if you prefer: 2 strips for the rectangular biscuits or 2 circles for the round ones.
The biscuits used here are rather dry by choice, but use your imagination and try this with richer biscuits (shortbread style) or with a stronger flavour (almonds, oats, etc.).