Open Question: Food franchise giving leftovers to charity?

I work for a nation-wide food franchise and every night I work, we throw out a ton of food (bread, vegetables and meat). I was wondering if we were to donate the left-over food to charity if we could be held legally responsible if anything were to happen. Should we not donate the meat? Should we make up a written agreement? What about the good samaritan act? I would prefer answers from people who work in businesses that participate in food donations. I would really like it if someone actually knew an answer, or at least where I could find one. However, as always, all answers are welcome :) Thanks!!