Cook the Polenta: In a medium saucepan, bring the vegetable broth to a boil. Add salt, then slowly whisk in the polenta. Lower the heat to a simmer and cook, stirring constantly, until thickened (about 5-7 minutes).
Flavor the Polenta: Stir in the butter, chopped sage, and Parmesan cheese (if using). Mix until the butter is melted and everything is well incorporated. Season with additional pepper to taste.
Set and Chill: Pour the polenta into a greased baking dish or a sheet pan, spreading it out to about 0.5-inch thickness. Let it cool at room temperature for about 15 minutes, then refrigerate for at least 1 hour until firm.
Cut the Polenta Sticks: Once chilled, remove the polenta from the refrigerator. Cut it into sticks or fry-shaped pieces, approximately 1 inch wide.
Preheat the Air Fryer: Set your air fryer to 400°F (200°C) and preheat for about 5 minutes.
Prepare for Air Frying: Lightly spray the polenta sticks with olive oil on all sides. This will help them crisp up nicely in the air fryer.
Air Fry the Polenta Sticks: Place the polenta sticks in a single layer in the air fryer basket, ensuring they are not crowded. Air fry for about 10-12 minutes, flipping halfway through, until they are golden and crispy.
Serving: Carefully remove the polenta sticks from the air fryer and serve hot, garnished with additional sage or Parmesan cheese if desired. Enjoy with a dipping sauce of your choice!
Notes
For a gluten-free option, ensure the broth and other ingredients are gluten-free.