Mushroom Crepe Cake

Name: Mushroom Crepe Cake
Ingredients: 1 cup diced yellow onions; 3 tablespoons butter; 2/3 pound shiitakes, stemmed and sliced thinly; 1/3 pound creminis, 1/2 thinly sliced, 1/2 fine diced; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly ground pepper; 4 ounces milk; 1/2 cup mild white cheese, mozzarella or provolone, shredded; Savory crepes, recipe follows; 2 tablespoons chives, thinly sliced; 1/4 cup Parmesan, shredded; 2 large eggs; 3/4 cup milk; 1/2 cup water; 1 cup flour; 3 tablespoons melted butter; 1/4 teaspoon salt; 1/4 cup chopped herbs, spinach, or sun-dried tomatoes; Butter, for coating the pan