Spinach and Bread Dumplings With Gruyère Recipe

Ingredients

• 120 gm salted butter, coarsely chopped
• 1 onion, finely diced
• To taste: fine sea salt
• To taste: freshly ground white pepper
• 3 free-range or organic eggs
• To taste: freshly grated nutmeg
• 500 gm day-old bread, cut roughly into 1cm square pieces
• 100 gm (1 cup) grated Gruyère
• 3 tbsp plain flour
• 300 gm baby spinach, boiled or steamed, finely chopped and well drained
• 3 tbsp milk
• Freshly grated Parmigiano-Reggiano