Step 1: Prepare the Broccoli Rabe : Trim the ends of the broccoli rabe and cut it into 2-inch pieces. Bring a large pot of salted water to a boil and blanch the broccoli rabe for 1–2 minutes. Remove with tongs or a slotted spoon and immediately transfer to an ice bath to stop cooking. Drain well.
Step 2: Cook the Pasta : In the same boiling water, cook the farfalle pasta until al dente (follow package instructions). Reserve ½ cup of pasta water and drain the rest. Set aside.
Step 3: Cook the Sausage : In a large skillet or sauté pan, heat olive oil over medium heat. Add the sausage and cook until browned and crumbly, breaking it up with a wooden spoon (about 5–7 minutes). Once cooked, remove excess fat if necessary.
Step 4: Add Garlic and Broccoli Rabe : Add garlic slices and red pepper flakes to the sausage; sauté for 1 minute until fragrant. Add the blanched broccoli rabe and toss to coat. Cook for another 2–3 minutes to combine flavors.
Step 5: Combine with Pasta : Add cooked farfalle and a splash of reserved pasta water to the skillet. Toss everything together over low heat until evenly mixed and lightly saucy. Adjust seasoning with salt, pepper, and lemon juice (if using).
Step 6: Finish and Serve : Remove from heat and sprinkle generously with grated Parmesan. Toss once more and serve immediately.