My mum was a real hippy, and way ahead of her time. I grew up with lots of vegetarian food, and I know my mum would have loved this tart. When I was 15, I was a veggie for a year, but then I had a bite of someone’s burger and that was it! It helps to have a mandolin to slice the courgettes in this recipe, but a sharp knife also works. If you don’t want to make your own pastry then shop-bought is fine – go for a 500g packet of ready-made wholemeal pastry.