Pi r squared. Pie r round. Tart r rectangular. The rectangular tart is the more rustic, country-mouse version of its classic round cousin. It looks stylish without pristine glazes or radiating starbursts of fruit. A simple trimming of nuts or berries in neat rows looks just right. Tatte’s, the fastest growing bakery and café in Boston, makes most of its tarts rectangular, and sells them for a tidy sum through Williams-Sonoma. I’ve made my own version of Tatte’s rectangular nut tart, heaping it high with whole toasted pistachios, hazelnuts, pecans, walnuts, and cashews, and drenching it in caramel. It took me a while to get the hang of making caramel, though. After endangering our…
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