Spinach and watercress soup with yogurt

Too much cake. Needed something super healthy for lunch, something warm as its cold outside!

I had a load of green leafy stuff that I bought with good intentions but must have been sitting in the salad drawer for best part of week so...

1 large white onion

3 garlic cloves, sliced

1 knob of butter

1 pint of chicken or veg stock (I used turkey stock frozen from Christmas)

1 bag of spinach

2 handfuls of watercress

2 pinches of freshly ground nutmeg

black pepper

big dollop of natural yogurt

1. Saute onions and garlic in heavy based saucepan in the butter. Stir for 5 minutes or so until soft.
2. Add spinach and watercress and pour stock on top.
3. Simmer for 10 minutes
4. Add nutmeg and pepper and whizz and serve with a dollop of yogurt