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Step 1
Start by combining green onions, garlic, vegetable oil, brown sugar, soy sauce, lemon zest, pepper flakes, salt, basil, lime juice, allspice berries, peppercorns, mustard, thyme, ginger, coriander, rosemary, and nutmeg in a food processor. Blend everything until you get a smooth paste, scraping down the sides as needed. Pour this jerk marinade into a large resealable plastic bag, add the chicken, and toss to coat it well. Seal the bag and let it sit at room temperature for about 30 minutes, giving it a little shake every now and then to make sure the chicken marinates evenly.
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Step 2
While the chicken is soaking up all those flavors, bring a big pot of salted water to a boil and cook your penne pasta until it’s tender but still has a little bite — about 12 minutes. Drain and set aside.
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Step 3
Next, melt some butter in a saucepan over low heat. Pour in the milk and let it come to a gentle simmer, cooking for about 5 minutes. Then, stir in the Parmesan cheese and garlic, whisking constantly until the cheese melts completely and the sauce comes together nicely. Set this creamy sauce aside for a moment.
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Step 4
Heat up a large nonstick skillet over medium-high heat and cook the marinated chicken until it’s cooked through and there’s no pink left inside — this should take around 7 to 8 minutes. Once the chicken is done, transfer it to the Alfredo sauce and let everything simmer together for 3 to 5 minutes, stirring frequently. This helps the jerk flavors blend beautifully into the sauce.
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Step 5
Finally, serve the chicken and sauce over your cooked pasta and enjoy!