My husband and I cook practically everything from scratch, as organic, grass fed, and preferably from our own garden as possible.
But when he got out of the hospital, he had to give his system a rest by going on a very bland, low residue, low fiber diet. So for a while he ate nothing but white bread, white rice, bananas etc.
His energy levels went way down, and he found even the smallest task difficult. He's back now on primarily a paleo diet and doing much better.
I can "cheat" on occasion, but if I eat too much junk food, my allergies start to flare, so that keeps my diet in check.