Rock cakes: No need to decorate, no faffing about with cases, just dollops of mixture onto a tray (line with baking parchment if you're doing more than one batch so you can get them off quickly). It's a rubbed in mixture, but that can be done by machine (if you blitz the fat & flour into crumbs, as you would for pastry or crumble topping).
Colour as wanted, replace the traditional dried fruit with bits of other stuff if preferred.
Colour as wanted, replace the traditional dried fruit with bits of other stuff if preferred.