Chef-made meals can increase school meal participation and vegetable intake among students, according to a recent study.

Chefs Move to Schools (CMTS), an initiative of Michelle Obama's Let's Move campaign, pairs chefs with schools in order to provide nutrition instruction to students and culinary advice to interested school food service workers.

Researchers found that the initiative could increase participation in the National School Lunch Program (NSLP) by 9 percent and overall selection and consumption of vegetables by 16 percent.

"These findings suggest that Chefs Move to Schools has potential to offer a win-win opportunity for school lunch programs and for students," Andrew Hanks, co-author of the study, said in a statement. "CMTS can increase NSLP meal compliance and also potentially improve students' nutrition by increasing consumption of vegetables or other healthy sides that complement the main dish."

For the study, researchers collected and analyzed school lunch sales and tray waste data before and after a CMTS event (held in an Upstate New York high school of 370 students) to determine its impact on student's food selection and consumption.

The professional chef arrived three days ahead of the date of the event to meet the lunchroom staff and observe student preferences. She also held a tasting event after-school for students to meet her and taste the foods she was going to prepare for lunch the following day.

To comply with the NSLP requirements for a reimbursable meal each student must select one entrée, one milk and three sides. The chef created five new NSLP compliant entree recipes: meat taco pizza, bean taco pizza, garlic spinach pizza, meat lover's pizza, and a mozzarella burger. She also prepared a new pre-packaged side salad. Each of these new items was offered as an optional alternative to the regular school lunch choices: pizza or burger, canned fruit, and green beans, broccoli and milk.

Sales data indicated that after the introduction of the new chef-made items, 9 percent more students bought NSLP compliant meals. Tray waste data showed that the high school students ate about the same amount of their entrée as they did before the new offerings were added; however, they actually ate 16 percent more of the selected vegetable sides- specifically the new salad. However, the researchers speculate that this increase was due to the appealing pairing of pizza and salad.

The findings were recently published in the journal Appetite.