I try not to eat a lot of frozen dinners because even the ones with "healthy" in their names tend to be rather high in sodium. I try to shoot for something that's between 250-500 mg of sodium; I think most of us get too much of it.
I have always liked the Brown Rice and Vegetables Bowl from Amy's. It comes close to the desired sodium range (540 mg). It is one of the best healthy dinners I've tried, with ingredients that I can pronounce.
One day, I accidentally grabbed Amy's Light in Sodium Brown Rice and Vegetables Bowl from the frozen section, which has about 250 mg. sodium. See meal description for this meal and Amy's other light-sodium selections here.
Both are excellent, but I have to give a slight edge to the higher-sodium version; however, the low-sodium version is great with the addition of just a little FRENCH'S® Reduced Sodium Worcestershire Sauce.