Preheat oven or air fryer to 190ºC (375ºF).
Cut the chicken breast into bites, then transfer to a large bowl.
Sprinkle the chicken with salt and the seasonings, then add the yogurt. With the help of a fork or spoon, give it all a good stir so that all chicken bites get coated with seasoning. Once mixed, you can proceed with the recipe or, if you have time, refrigerate for about 2 hours (recommended as this will allow the chicken to marinate better).
Once marinated, add to the chicken the cornstarch (or flour) and the egg whites. Give it a good stir until all is well combined.
Roll each chicken bite into the panko crumbs (or breadcrumbs) thoroughly, until the bites are completely breaded.
Line the popcorn chicken bites over a parchment paper covered baking sheet and spray or brush with olive oil. Bake in hot oven or air fry for 12 to 15 minutes, flipping halfway through.