The problem is tasty is a conditioning effect. The reason healthy food is not as tasty as junk food is that it has a lot less of the substances that used to be much rarer, like fats, salt, sugar. It makes sense that those are so tasty because they used to be rare.
To be able to eat healthier requires weaning yourself off high salt/sugar foods to get reacclimitized to food that has those substances in proportions that we've evolved to handle.
