Twin Cities composer Edie Hill has created everything from solo pieces to symphonies. Her latest is a short work for the Twin Cities Women’s Choir — Thaw, inspired by a poem of the same name by Lola Ridge.  3-Minute Egg met with Hill and the choir’s artistic director, Mary Bussman, during a rehearsal for performances May 1 and 2 at St. Mary’s Greek Orthodox Church, in Minneapolis.