I know this about sweet potatoes: they furnish more nutrition of the right kind than any other food. I researched that years ago when I was searching for the best canned foods to store based on nutrition. Even the canned ones are loaded with what one needs.
When I buy fresh ones, I bake them like regular potatoes - don't boil them and mash them, don't want to interfere with the nutrition they have inside. If you look at a can you will see what the canned ones provide. They are much better nutrition than a regular potato. That is because they are orange. Normally, darker colored foods have more nutrition than light colored foods. This goes for fruit, too - the darker the better. “Black”berries have more antioxidant than lighter colored fruit. Cherries also have more antioxidant than lighter colored fruits. I knew all this before I started trying to grow food plants. This is why I got the blackberries than another berry.
I like to bake sweet potatoes. Add a little salt and sometimes a pat of butter. I also like sweet potato fries, but I don’t eat them that way very often.