Add the walnuts and sunflower seeds to a dry pan over a low/medium heat. Toast gently for 2-3 minutes. Set aside.
Step 2
Add the mayonnaise, sour cream, lemon juice, lemon zest, anchovy, garlic, mustard and a good pinch of salt and pepper to a food processor. Blend well to combine.
Step 3
Slowly drizzle in the olive oil until you have a smooth and creamy dressing.
Step 4
Add the spinach and kale to a salad bowl. Spoon over the dressing and use your hands to massage into the leaves.
Step 5
Toss the salad leaves with the toasted nuts and seeds and sprinkle over the remaining Parmesan to serve.