San Antonio and New Orleans were founded at the same time,  so many food traditions related to European and Catholic roots are hallmarks of cuisine in both cities.  I love discovering the links between the two cities, and learning new recipes along the way.  One of my favorite little cookbooks documents the cookery of the Old Ursuline Convent on Chartres Street.  The Sisters were part of the Parish established in 1720 in what became the French Quarter.  They performed many tasks– caring for the sick, teaching reading and writing and silk making.  But by far their most lasting legacy is their adaptation of French cooking to local ingredients and techniques.   They brought with them recipes for such things as pralines– a popular treat in the region of…