In a large bowl, sift the all-purpose flour, then add the dry yeast, salt, and sugar. Mix well.
Pour in the lukewarm water and olive oil, then start kneading. Knead until you have a smooth, elastic dough. Cover and let it rise for 1 hour.
While the dough is rising, prepare the filling. Break the cauliflower into small florets and boil them in lightly salted water for 5 minutes, then drain.
In a skillet, sauté the finely chopped garlic in a little olive oil, then add the drained cauliflower. Sauté for another 3-4 minutes.
Divide the risen dough into two equal portions, then roll each out into a circle on a lightly floured surface.
Spread tomato sauce on one half of each dough circle, then top with the sautéed cauliflower, grated mozzarella, and Parmesan cheese.
Sprinkle the filling with oregano, basil, and a pinch of black pepper.
Fold the other half of the dough over the filling, then crimp the edges to seal the calzone and prevent the filling from leaking out.
Brush the top with beaten egg and prick a few holes with a fork to allow steam to escape during baking.
Bake in a preheated oven at 400°F (200°C) until golden brown, about 20 minutes.
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