Heat 1 1/2 cups filtered water for 30 seconds in the microwave
Add 1 1/2 tsp active dry yeast and 1 1/2 tsp sugar to the warm water and stir to dissolve. Allow the yeast to bloom for 5 minutes or until foamy.
In a mixing bowl combine 1 1/2 tsp salt and 3 1/2 cups all purpose flour
Create a well in the center of the dry ingredients and add the water and yeast mixture.
Add 1 1/2 tbsp olive oil to the top of the water.
Mix the ingredients using a dough hook attachment on a stand mixer or a using a sturdy wooden spoon.
If using a stand mixer, allow to mix for 5 minutes.
Perform stretch and folds until the dough becomes stiffer. Take care not to rip the dough.
Lightly drizzle 1/2 tbsp olive oil over the surface of the dough and flip the dough ball so that the seam is on the bottom.
Cover the bowl with a clean dish towel and rise 1 hour or until doubled in size in a warm place.
Preheat the oven to 425 ℉
Divide the dough into 4 equal sections.
Gently press the dough into 6-8 inch circles.
Spread 2 spoonfulls of tomato sauce across each calzone circle, avoiding the edges.
Add 1/4 cup shredded mozzarella cheese on top of the sauce.
Fold the calzone in half so that the edges meet - making a half moon shape.
Press the edges together to seal the filling inside.
Place the calzones on a parchment paper lined baking sheet.
Whisk an egg to make an egg wash and brush the calzones with the egg wash.
Bake for 15 minutes.
Allow the calzones to cool for 10 minutes so that the cheese doesn't spill out after cutting.
Serve with marinara sauce for dipping or a light grating of parmesan cheese.
Enjoy!