In a large skillet, over medium-high heat, add the sausages, crumbling it as it cooks up, then add your fennel seeds and red pepper flakes. Cook until the sausage is fully cooked. Add your spinach leaves, and saute until they are wilted. Remove from heat.
Add your egg, oregano, and the garlic salad to a small bowl, and mix until well blended. Then fold in the shredded mozzarella cheese.
Add your dough on a floured surface and roll it out until it's in rectangle shape. Add the sausage filling into the center of the dough, leaving about a ⅓ inch border on all sides. Roll up.
Add the pizza bread to a parchment or silicone-lined air fryer basket. Brush with olive oil, and season with the dried oregano. Set the temperature to 320 degrees F, air fryer setting, for 10 to 15 minutes, or until the dough is cooked. Depending on your air fryer, you may have to flip it halfway during the cooking process.
When the pizza bread is almost done cooking, brush with the melted butter, garlic, and parmesan cheese, right before serving.
Serve with marinara or pizza sauce.