Preheat the air fryer to 400°F for 5 minutes.
Mix the milk and breadcrumbs (5 min): Add the breadcrumbs to a large bowl and pour the milk on top. Let it sit for 5 minutes. Now is a good time to chop the shallot and garlic.
1/4 cup Italian bread crumbs, 1/4 cup milk
Combine the meatballs (5 min): Add the beef, shallot, garlic, seasoning, parmesan cheese, and parsley. Mix to combine then use a medium cookie scoop to form the meatballs into 1 1/2-inch meatballs. You should have 20-22 meatballs.
1 pound ground beef, 1 shallot, 2 garlic cloves, 1 teaspoon Italian seasoning, 1 teaspoon kosher salt, 1/4 cup grated parmesan cheese, 3 Tablespoons fresh parsley
Roll the meatballs (5 min): Spray the air fryer basket with cooking spray and place the meatballs in a single layer, without them touching. Work in two batches if your air fryer is small. Drizzle the tops with olive oil.
1-2 Tablespoons olive oil
Air fry (9-11 min): Air fry at 400°F for 9-11 minutes, or until the internal temperature reaches 165°F.
Serve them warm with parmesan cheese and marinara sauce, on top of pasta, inside a sub, etc.