A creamy, green super soup from the grande dame of Italian cooking
November 8, 2018 16:5730g unsalted butter
2 tbsp olive oil
1 onion, chopped
1 x 150g can cannellini beans
250ml vegetable stock
1 bunch watercress, washed
500g fresh spinach, roots cut off and washed thoroughly
Salt and freshly ground black pepper
Single cream and crushed chilli flakes to serve, optional