Celebrity chefs are joining forces with school cooks to promote school lunches.
Hundreds of schools across England will be taking part in the celebrations, which mark the biggest healthy awareness eating week aimed at children.
Nick said: "It's a very simple truth that if you don't give children a healthy, balanced meal at lunchtime, you can't expect them to sit down, concentrate and learn well in the afternoon.
"That's why I'm so proud of the work we've done in Government to put school food back on the agenda. We've introduced new food standards, cooking on the curriculum and free school meals, which can save families up to £400 per year, help children do better in class and improve their daily diet.
"This week is about not only encouraging children to really understand and enjoy the food they eat but to celebrate all the schools chefs and catering staff who work day-in day-out to help provide school meals and ensure that we live in a fairer society where every child can get the best possible start in life, regardless of their background."