The classic combination of spinach and ricotta cheese, subtly enhanced with the flavour of nutmeg, makes a delicious filling for this vegetarian quiche.
To make the filling, wash the spinach well, remove the stems and pat dry with paper towels. Melt the butter in a deep frying pan over medium heat. Add the spinach and cook for about 8 minutes, or until it is wilted and the water has evaporated. Place in a strainer to cool, squeeze out any excess liquid and then finely chop the spinach.