find some way to incentivise healthy eating in America

I'm someone who has struggled with being overweight my whole life, I am only now as a college student attempting to get healthy. But when i started to make the switch to healthy eating my grocery bill skyrocketed. I can go out and spend 10 dollars on a couple avocados and some bananas or i can spend the same 10 dollars and buy a giant pack of chicken nuggets. As a college student that's a no brainer.
I think in order to help make Americans healthier we need to find some way to make it cheaper to do so.