Heat the oil in a pan.
Add the onion, cover, then gently fry for 15 mins until soft and almost transparent.
Add the pine nuts, turn up the heat, then fry for 5 mins more or until the onions are dark golden.
Stir in the garlic, grate in a little nutmeg, then fry for 1 min. Splash in vinegar.
Stir in the spinach and cook for 2-3 minutes, until wilted.
Season to taste, and serve.