Basically, she said that she will contact the cast and is sure that Kohei Yamamoto, who plays Kouta Bitou/Hurricane Yellow will be onboard with whatever project she is planning. Nagasawa loves Hurricaneger so much that she wants to do something special for its 20th anniversary, and is hoping for our support for this project!
As for the instructions on how to do the Hurricane Blue character bento, you can learn more by visiting the Super Sentai Friends website, and by watching the video, which is sadly region locked, but you can view it in the usual places if you know where to look.