I would just say to be careful in your idea of “Portion.” I have looked at those and sometimes the idea is a 200 calorie meal. That’s virtually starving as it is less than a thrid of what the average person needs to barely survive, much less “work the fields.” But it’s got some variety and it’s a starting point, I’ll give you that.
Datrex of Mainstay.
Cheap calories.
No kidding. I found the nutrition information. Serving sizes are 1 cup. Calories range from 80 to 220 depending on the dish.