Turmeric is a rhizome or rootstock of a South Asian member of the ginger family. As the major ingredient in curry and a cheaper alternative to saffron, it is commonly used in Indian, South Asian, and Middle Eastern cooking as much it seems, for its color as for its flavor. In fact, in the past turmeric was used for dyeing textiles and fabrics, for making cosmetics, and even for religious and cultural ceremonies, Hindu and other, especially in India. Turmeric is considered to have medicinal uses and is even being studied currently for its potential cancer-fighting properties.
In this dish, the turmeric pairs up with cumin, coriander, and paprika to spice up roasted root vegetables and give them an unexpected and exotic twist. First the vegetables are roasted in a very hot oven, an unorthodox method we first came up with at Lucques. We were having problems when working with baby vegetables, unable to get the sear and caramelization we wanted without overcooking the vegetables. Even with our deck oven cranked to 550°F, the results were either tender and pale or nicely browned and mushy.
My longest-running kitchen employee, Rodolfo Aguado, who started working for me as a surly fifteen-year-old dishwasher at Campanile and now runs our very busy catering department (and has three kids of his own), came up with the brilliant idea of preheating the sheet pans before placing the vegetables on them. It really works wonders: you get a great roasted sear and can control the tenderness-versus-mushiness issue as well.