Preheat oven to 180C/350F/Gas mark 4. Heat the olive oil in a small pan and gently fry the onion until softened.
In a bowl mix the fried onion, spinach, Galbani Finetta Ricotta, nutmeg, salt and pepper.
Put pancakes onto a flat surface and spoon about 2 tablespoons of the filling onto each, spreading a little lengthwise.
Roll up the pancakes, cut in half and arrange (4 pieces) in four individual shallow ovenproof dishes.
Sprinkle with Galbani Parmiggiano Reggiana cheese. Bake or grill for 5 mins or until the cheese has melted.