1Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Reserve 1 cup (250 ml) pasta cooking water, then drain the pasta.
2In the same pot, heat the olive oil at medium heat. Then add the garlic paste and cook until fragrant. Whisk in the ricotta, Parmesan cheese, lemon juice and zest, salt and pepper until well combined.
3Add 1/2 cup (125 ml) pasta water to the sauce and whisk until smooth. Add the pasta and the kale and continue to stir until the noodles are well coated and the kale softens. Add more pasta water as needed for a smooth sauce.