Protein really should be kept up on both rest and work days, but you can manipulate carbs for a more favorable response by keeping them low on rest days and eating more on work days if you like. Lots of times you just gotta play with that aspect of things and find what works best for your own circumstance.
Just for an example from my own experience.... I eat at a sushi buffet once a week, but always after a workout. Most the rest of the week I don't bother much with starchy carbs and usually only eat a couple pieces of fruit. This works well for me. I'm male round 15% bf (5' 9" and 162lbs) and not looking to lose weight though, just adding a bit more strength....but, as I've been exercising my whole life it comes slowly these days.