Cook 280 g Pasta according to the packet instructions, normally 10-12 minutes.
Put 20 g Kale, 30 g Pine nuts, 15 g Parmesan, 60 ml Olive oil, 1 tablespoon Lemon juice, 2 Garlic cloves, 1 pinch Sea salt and 1 pinch Ground black pepper into a food processor.
Process to form a smooth pesto.
Once the pasta is cooked, drain and return to the pan. Stir the pesto through the pasta and serve immediately.
Notes
Remove any thick, woody stems on the kale before blending. The leaves blend much more easily and give you a smoother sauce.
Do not skip tasting the pesto before tossing it with the pasta. Kale can vary in bitterness, lemons vary in sharpness, and Parmesan varies in saltiness. A quick taste lets you balance everything properly and add more salt, pepper or lemon if needed.
Avoid overheating the pesto. This is not a sauce that needs lots of cooking. Stir it through the hot pasta off the heat or over very low heat.
If your pesto feels too thick, add water a tablespoon at a time until it blends smoothly. If it tastes a little flat, it almost always needs either more salt, more lemon, or a little extra Parmesan. If it tastes too sharp, add a touch more olive oil or Parmesan to soften it.
To make it feel even more special, toast the pine nuts before blending. This is a small step, but it adds a deeper, warmer flavour that makes the pesto taste even better.