In a food processor gently blitz all of the dry ingredients (except raisins) to resemble a crumble.
In a saucepan, on low melt the honey, tahini and butter. Add this to a large bowl and mix through the dry ingredients. It should become sticky. If it’s still a bit dry, melt some more butter and stir through.
Stir through raisins or another dried fruit of your choice (figs, prunes, dates, apricots, goji berries, cranberries).
Line a baking tray approximately 20cm x 20cm or 30cm x 15cm with baking paper. Spread evenly over the tray and press down with the back of a spoon until it is firm.
Place in the freezer and freeze for a couple of hours until it is set and firm.
Remove from freezer and slice into muesli bars. Enjoy.