"Rice was a staple of many of their home foods, " Groff said of the students.
Groff had the opportunity to meet Woodstock co-founder Michael Lang, whom he plays in the movie.
Following the announcement this week, Groff said he was welcomed into a PTA meeting with roaring applause.
Jonathan Groff also came to "Taking Woodstock" with limited big-screen experience and was excited to work with Lee.
Groff worked closely with the department so that the menu changes came at no additional cost to the school.
The school's focus on healthier meals began three years ago when Groff noticed a majority of students were bringing their own vegetarian meals.
"We've been working with tofu for a few months, " Groff said.
"We discovered early on that our kids were gravitating toward our vegetarian offerings, and we kept expanding the program to meet the demand, " principal Robert Groff said.
Although there haven't been similar watershed events since, Schreiber and Groff said that the most similar event could be the 2008 election campaign, during which many young people rallied behind Barack Obama.
"He came to the first day on set, and that was a little nerve-wracking, but it then became comforting because as we would be between takes he would, you know, be giving you a little thumbs-up, " Groff recalled.
But "the vegetarian menu fits right in with our mission, and we are thrilled that our students in pre-kindergarten all the way up to grade three understand the importance of healthy and nutritious meals, " Groff said in a statement.
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