Hi,
have you think about an App that could tell you which food recipes can be made according to the protein (beef, chicken, etc), vegetables and fruits that you have at home in order to reduce food waste?

I found your idea quite interesting and useful. After reading the comments below, I´m agree with Mitch about the colours. What about mention in the yellow phase: "Eat Now or donate"? so people can reflex  if they are going to really eat it or not and people will not feel pressure to donate; thus, the consumer will have 2 options with a responsible action.
Good luck with your project!