Grated butternut squash adds color and nutrients to this brown rice pilaf. Greeks like to use winter squash, especially pumpkin, to make savory and sweet pies, fritters and croquettes, casseroles and myriad other dishes with fall's telltale vegetables, but these dishes are virtually unknown outside the country. It's traditionally made with pumpkin, but since most pumpkins in the U.S. are grown for carving jack-o'-lanterns (and not for cooking), we've modified the recipe to work with readily available butternut squash. The original dish calls for Greek pilaf rice, a short-grained, polished rice that is hard to find outside the country, so we've substituted instant brown rice.