In a bowl, combine water, sugar, and yeast. Add flour and mix until incorporated. Add olive oil and salt, then knead until fully absorbed. Continue kneading, slapping, and folding the dough until it becomes smooth.
2
Place the dough in an oiled bowl, cover, and let it rise until doubled in size. Punch out the air, then transfer to a counter and divide into 8 equal pieces. Roll each into a ball and bench rest for 10 to 15 minutes.
3
Roll out each dough portion, add the shredded cheese, diced ham, and cheese filling. Fold in half, press the edges firmly, and pinch the edges to seal completely.
4
Heat oil in a frying pan over medium heat. Fry the calzones for about 2 minutes per side until golden brown. Alternatively, you can bake them at 180°C (350°F) for 20 to 25 minutes.
5
Let the fried calzones cool for at least 5 minutes.