01 - Bring a large pot of generously salted water to a rolling boil. Add the mafaldine and cook according to package directions. During the last 5 minutes of cooking, add the broccoli florets to the pot. Cook until the pasta is al dente and the broccoli is tender-crisp. Reserve ⅓ cup of starchy pasta water before draining.
02 - While the pasta cooks, heat the olive oil in a large skillet over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant, taking care not to let it brown.
03 - Pour the heavy cream into the skillet and bring to a gentle simmer. Stir in the lemon zest, lemon juice, Parmesan cheese, salt, and pepper. Continue stirring until the cheese melts and the sauce is smooth.
04 - Add the drained pasta and broccoli to the skillet. Toss everything together, adding splashes of the reserved pasta water as needed to loosen the sauce and help it cling to the noodles. Adjust seasoning to taste.
05 - Transfer to warmed plates or a serving bowl. Garnish with fresh basil leaves, an extra dusting of Parmesan, and additional lemon zest if desired. Serve immediately.