U.S. students fed up with the slim pickings at their school cafeterias are once again taking to Twitter to share pictures of unappetizing -- and sometimes unrecognizable -- food using the hashtag #ThanksMichelleObama.

Michelle Obama has been the public face of a years-long campaign to improve the nutrition content of the national school lunch program, after vowing to help tackle childhood obesity. The new guidelines that came out of the Healthy, Hunger-Free Kids Act require meals to contain fruits, vegetables and whole grains, and limit sodium, fat and calories.

Many students and schools have not exactly warmly embraced the new rules, with some choosing this week to revive last spring's #ThanksMichelleObama hashtag to post photos of their unappetizing meals.

 

Still, others offered their support to Obama, saying she shouldn't be asked to shoulder the blame for the poorly prepared meals from school lunch programs.