Sarah Wu ate a school lunch every day for a year, secretly photographed her tray, and wrote about the experience on her blog Fed Up With Lunch., which attracted tens of thousands of followers.

She now shows and tells her story in a just-released book, “Fed Up with Lunch: The School Lunch Project: How One Anonymous Teacher Survived a Year of School Lunches” (Chronicle, $22.95).

Wu stirred interest because she is throwing a spotlight on the contentious issue of children’s nutrition. With a third of American kids obese today, many people have tried to get schools to dish up a healthier fare.

Wu went public today on ABC’s Good Morning America.

For a look at the lunches, if you can stomach it, watch Wu’s music video.

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