Work diligently and passionately to show her potential to be a physician for patients and/or biomedical scientist for next generation of medicine.
Then, try best to continue her research after summer in the same lab for substantial progress with the convinced achievement for example an abstract for national or international professional conference and/or a co-author in a peer reviewed manuscript by applying for the Regeneron Talent Search and/or the college via SCEA or EA (or ED) and RD with a stellar LOR from the mentor.
GL to her in the coming months/year.