Hazırlanışı
1Combine 00 flour, active dry yeast, salt, whole milk, and unsalted butter; knead until smooth and elastic, then let rest 30 minutes.
2Finely chop onion and sauté in olive oil over low heat until soft and translucent, about 8 minutes.
3Slice white button mushrooms and add to onion; cook over medium heat until liquid evaporates and mushrooms are golden, about 15 minutes.