1 garlic clove, finely chopped
100²µ/3½´Ç³ú white onion, finely chopped
100²µ/3½´Ç³ú spinach leaves
300²µ/10½´Ç³ú watercress, tough stalks removed
sea salt and freshly ground black pepper
20g/1oz unsalted butter
100ml/3½fl oz crème fraîche