What is the healthiest food for you
The ones that make you happy (in moderation).
It depends on what your particular body needs, biologically. If you're concerned about your health, good idea to see your doc and get some blood tests done. They may refer you to a nutritionist.
Overall, raw green and brightly colored vegetables are good, especially kale.
All real foods have some value nutritionally. We are meant to eat a wide variety of foods. Ironically, 'exotic' food just means food from somewhere else -- the food that grows near you is a good choice -- and remember, everything (real) in moderation.