Запеканка из грибных блинчиков

Ингредиенты

• 250 Plain flour, sifted - for the crepes
• g Whole milk - for the crepes
• 300 Eggs - for the crepes
• ml Melted unsalted butter - for the crepes
• 2 Vegetable oil - for the crepes
• 2 Parmesan cheese, grated - for the crepes
• tbsp Unsalted butter - for the filling
• 2 Banana shallots, peeled and finely chopped- for the filling
• tbsp Garlic clove, peeled and finely chopped- for the filling
• 50 Button mushrooms, finely chopped- for the filling
• g Finely chopped thyme leaves- for the filling
• 75 Finely chopped flat-leaf parsley- for the filling
• g Whole milk - for the sauce
• 2 Bay leaf - for the sauce
• 1 Black peppercorns - for the sauce
• 1 Onion, peeled - for the sauce
• kg Unsalted butter - for the sauce
• 2 Plain flour, sifted - for the sauce
• tsp Pinch of salt - for the sauce
• 2 Cayenne pepper - for the sauce
• tsp Freshly grated nutmeg - for the sauce
• 400 Baby spinach leaves - for the spinach
• ml Extra virgin olive oil- for the spinach