Cook the elbow macaroni until it’s al dente, then set it aside. In a saucepan, melt butter over medium heat and stir in flour to make a smooth paste.
Slowly whisk in the half-and-half and let it thicken slightly. Add shredded cheddar and stir until creamy. Mix the sauce with the macaroni until well coated.
Lightly spray a baking pan with nonstick spray, then spread the mac and cheese mixture evenly. Refrigerate for at least 4 hours, or until it becomes firm.
Once chilled, cut it into small squares and roll them into balls. If they feel too soft, just chill them a bit longer.
In one bowl, whisk the eggs with a splash of milk. In another bowl, mix panko breadcrumbs with olive oil and Italian seasoning. Microwave the breadcrumbs for about a minute, stirring halfway, to make them extra crunchy.
Dip each ball in the egg mixture, then roll it in the breadcrumb mix. Press lightly to help the coating stick. For extra crunch, repeat the coating process twice.
Preheat your air fryer to 380°F and spray the basket with cooking spray. Arrange the balls in a single layer, making sure they don’t touch. Air fry for 9–10 minutes, flipping halfway for even crispiness.
Place the fried balls on a plate, sprinkle with Parmesan, and serve them warm with marinara sauce. These are best enjoyed hot and fresh!