Frozen Veggies are fairly low in calories, but they can be so bland. Butter or margarine will add lots of calories.
Lower-calorie soups like the Progresso Light series offer a serving of soup at under 100 calories.
So,,, If you take half-a-package of frozen veggies and dump it in a bowl (with a lid), then open the can of soup & pour only the liquid part over the veggies, you can cook up a good lo-cal meal (or half-meal, if you're really hungry). THEN I can cook/eat the rest of the soup!
The nice thing is, I always seem to have lots of liquid left over when I finish the veggies, meat and/or other goodies in a can of soup, so I turn that around: Use the extra to cook the frozen veggies, giving them flavor, and without adding any extra calories for butter or margarine or oils.