All of the above would give some nutritional value. I would have to say that cornstarch and creamed corn would give mostly added calories with small amount of vitamins. Cornstarch does not even give fiber, which at least the creamed corn does.
The non-fat milk would add protein, vit D and calcium, no fiber.
Pureed root vegetable would give the most vitamins, and fiber to dish.
They all work to increase creaminess with out added fat.
So basically all do add something, some more than others, and different nutrients.
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Watch with a timer would be the most useful for monitoring your heart rate
