Rich accordion thread of cheese and mushrooms

INGREDIENTS For the dough: 600 gr of flour 0000. 200 gr of flour 000. 7 gr of yeast powder, approximately. 2 teaspoons of fine salt. 500 cc of warm water. 50 gr of soft butter. For the filling: 2 chopped onion. 500 gr of mix of mushrooms. Garlic chopped. 1 glass of white wine. 1 tablespoon of starch. 300 gr of cheese mix (provolone, sardo and pategras). 1⁄2 bunch of fresh rosemary. Salt and pepper. PROCEDURE Mix both flours, yeast powder and sal…