Prepare the dough by bringing your pizza dough to room temperature, which typically takes about 30 minutes.

In a mixing bowl, combine ricotta, shredded mozzarella, grated Parmesan, and any cooked meats of your choice with fresh spinach, dried oregano, garlic powder, salt, and pepper.

On a lightly floured surface, roll the pizza dough out to about ¼-inch thickness.

Cut the rolled-out dough into circles approximately 6-8 inches in diameter.

Place a generous scoop of the prepared filling on one half of each dough circle, about 2-3 tablespoons.

Gently fold the dough over the filling to create a half-moon shape and seal the edges.

Preheat the air fryer to 375°F (190°C) for about 5 minutes and brush the tops of the calzones with beaten egg.

Arrange the calzones in the air fryer in a single layer and cook for 10-15 minutes.

Check for doneness by ensuring the filling is bubbly and the dough is golden brown.

Once cooked, let the calzones cool for about 5 minutes and serve with marinara sauce.