Preserving, using up and seasonal eating is the Cornersmith way. Since opening their neighbourhood caf in Sydney in 2011, Alex Elliott-Howery and Sabine Spindler have been committed to sustainability. Their recipes put veggies first with dishes such as black bean and spring slaw tortillas. Quick recipes include roasted sweet potato and parsnip topped with feta and walnuts, or make a tabbouleh with leftover veg ahead of time for an autumnal evening...