Bring a large pot of salted water to a boil. Add the rigatoni and cook according to package instructions until al dente. Drain and set aside.
While the pasta is cooking, blanch the chopped kale. Bring another pot of salted water to a boil, then add the kale. Cook for about 2-3 minutes until it's tender but still bright green. Drain and immediately transfer to a bowl of ice water to stop the cooking process. Drain again and squeeze out any excess water.
In a food processor, combine the blanched kale, minced garlic, grated pecorino cheese, lemon zest, and lemon juice. Pulse until everything is finely chopped.
With the food processor running, slowly drizzle in the olive oil until the pesto reaches your desired consistency. You may need to add a bit more olive oil if it's too thick.
Season the pesto with salt and black pepper to taste. If you like it spicy, you can add a pinch of red pepper flakes as well.
In a large mixing bowl, toss the cooked rigatoni with the pecorino pesto until the pasta is well coated.
Divide the pasta among serving plates. Garnish with extra grated pecorino cheese, a drizzle of olive oil, and pine nuts if desired.Enjoy your Rigatoni with Lemony Kale and Pecorino Pesto! It's a delicious and nutritious dish with a lovely balance of flavors.