My children’s new TV heroine is a redheaded, knife-wielding, 43-year-old mom. On the Food Network, she cooks, takes pictures, and keeps house for her cowboy husband and their four children. You may know her as the Pioneer Woman. For grown-ups, hers is a dreamy romantic tale. Oklahoma-born Ree Drummond lived the big-city life in L.A. as a young woman before returning to her roots, falling in love, and becoming a rancher’s wife. One day in 2006 she started a blog. Her story has since spawned cookbooks, children’s picture books about her basset hound, a memoir, a movie in the works, and a new …