In a small bowl, whisk flour with the salt and water until a batter forms. It should be thick. You can add more water or more flour as needed to change the batter’s consistency.
Stick a toothpick into an olive and dip and roll the olive in the cornstarch, then the batter, and then the breadcrumbs.
Add oil to a pan and heat until adding a droplet of water makes a dramatic sizzle.
Using tongs, gently add the battered olives to the oil, one at a time, and fry for a few minutes until golden brown, flipping if needed. Remove from oil and allow to cool before serving!