Before I offer my recommendation of what kind of frozen dinners or restaurant food to eat, I urge you to consider cooking at home more often. It is cheaper, healthier and quicker if you plan ahead and make large batches to reheat in portions throughout the week.
While you’re possibly under the impression that all frozen dinners and restaurant food are high in salt and carbohydrates, there are healthy alternatives to both options. I would opt for restaurant food over frozen dinners because there are more opportunities to consume fresh food. Particularly, Subway has several low-carb subs with an array of fresh vegetables from which you can choose to top your sub, which adds fiber.
If you must eat frozen dinners, try the Kashi variety of Chicken Florentine. Though it has about a quarter of your daily intake of salt, this amount is actually lower than that of many other frozen dinners. More importantly, it is lower in carbohydrates and high in fiber.