In a microwave-safe bowl, combine 1 1/2 cups shredded mozzarella and 2 ounces cream cheese. Heat in the microwave for 90 seconds, stirring every 30 seconds until melted.
Add 1 egg, almond flour, and baking powder to the bowl. Mix with your hands until a dough forms, then shape into a large ball.
Divide the dough into 3 equal pieces and roll each into an 8-inch circle between parchment paper.
Transfer the circles to a baking sheet.
In a medium bowl, combine the cheeses and cooked Italian sausage for the filling.
Place 1/3 of the filling on one half of each dough circle. Fold the dough over and seal the edges with a fork.
Beat the remaining egg and brush it over the tops of the calzones. Cut 3-4 slits in each calzone and sprinkle with oregano and salt.
Bake for 20-26 minutes until golden brown.
Notes
Feel free to customize the filling with your favorite ingredients. Enjoy!