Broccoli and kale soup with lemon creme fraiche

Name: Broccoli and kale soup with lemon creme fraiche
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: French, Mediterranean, European
Ingredients: Broccoli and kale soup; 200 gram kale leaves, stems removed, chopped coarsely; 1 1/2 tablespoon olive oil; 1 large brown onion (200g), chopped finely; 3 clove garlic, chopped finely; 1.5 litre (6 cups) good-quality vegetable stock; 650 gram sebago potatoes, chopped; 450 gram broccoli, cut into florets, stems sliced thinly; 1 cup loosely packed fresh flat-leaf parsley leaves; Lemon creme fraiche; 1 cup (240g) creme fraiche; 1 tablespoon finely grated lemon rind; shredded lemon rind, to serve