I rarely have any old bread hanging about in my home, so I have to say I cheat and always have a packet of panko crumbs at hand. These are the most fabulous crumbs of all (although quite pricey) and are fascinating as they are Japanese in origin. Japanese cuisine doesn't have an historical bread culture like the artisan breads we now see being made the length and breadth of the country. Bread just isn't a traditional Japanese commodity, and yet it is they who have concocted the best crumbs. Ever. Panko crumbs are white and resemble slightly long, coarse shavings. They are also sometimes called honey panko - hinting at honey being included in the mixture - although if you read the list of ingredients honey rarely makes an appearance. One thing they do contain is sugar, and this means that when the white crumbs are deep-fried the sugar caramelises and you end up with a glorious golden crumb, not a dense brown one if using super-fine crumbs. The next best thing to them (less expensive and relatively easy to do) is to grate 2-3 day old crustless sourdough with a coarse grater and you'll end up with something similar - a lovely texture, and the added advantage of sourdough is the lovely sourness inherent in the bread. Many Jewish-owned fish and chip shops in London use crushed matzo crackers (eaten traditionally during Passover celebrations) to crumb their fish, and I've also enjoyed fish and chicken crusted with smashed cornflakes which are, unsurprisingly, delicious too.
When I was a kid, we'd dry left-over bread in the oven on trays, often it'd turn toasty brown in colour. We'd then blitz the dry bread in our Kenwood Chef blender until it was superfine crumbs and this is what I grew up having on the outside of wiener schnitzel, and still adore. If we'd had a food processor then, then that would have done a better job, but I doubt many New Zealand households had such fancy things back in the 60s.
Gran, on the other hand, would toast her bread in the oven the same way, then place the broken up toast in a brown paper bag and bash it to buggery using a rolling pin. Same end result, but a little more coarse and therefore more interesting texturally.
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