"Create a bulk artisan chocolate bar recipe named 'OHRIS' using only these ingredients: 70% dark fine cocoa chocolate, peppermint powder, and crushed pistachios. Make it unique, balanced, and approachable, with the peppermint enhancing the chocolate rather than overpowering it. The recipe should be suitable for 12 bars of 100 g each, use metric units, and be beginner-friendly and practical for small-batch production. Do not add any other flavor ingredients beyond the listed ones."