To a large pot, boil the pasta according to package directions; drain and return to the large pot.: You will hear the water at a rolling simmer before adding the pasta , and once it hits the pot it should bubble steadily. The fragrance of starchy steam is comforting, and draining when the pasta is al dente means it still has a slight chew, which helps it hold sauces and pan juices. When you toss it back into the pot, the residual heat keeps it from cooling too quickly. A common mistake is overcooking, which turns the pasta mushy and unable to carry the dressing, so set a timer and taste a strand or two a minute before the package time ends.
While pasta cooks, to a separate large skillet, add the chicken, drizzle with 2 tablespoons olive oil, evenly season with lemon pepper, salt, and cook for about 5 minutes, or until chicken is cooked through. Stir and flip intermittently to ensure even cooking.: As the chicken hits the hot skillet, you should hear an immediate sizzle and begin to smell savory notes rising, signaling a good sear is forming. The surface will turn a light golden brown where it contacts the pan, adding depth through the Maillard reaction, and those browned bits are flavor gold. Stirring and flipping intermittently promotes even color without steaming the meat, which preserves juiciness. If you crowd the pan the chicken will steam instead of brown, so give each piece room. Check one piece by cutting the center to ensure there is no pink remaining.
Add the garlic and cook for one minute, or until fragrant. Stir nearly constantly.: The moment the minced garlic hits the warm oil and chicken , its aroma should bloom quickly, and the pan will smell bright and inviting. Stirring nearly constantly prevents localized burning, which causes bitterness and ruins the dish. One minute is usually enough for garlic to brighten the pan; watch for tiny golden flecks rather than dark brown bits. If the garlic browns too fast, reduce the heat immediately and remove the pan from direct high heat to avoid a bitter aftertaste.
Add the lemon juice, half the spinach, stir to combine, and cover skillet with a lid for about 2 minutes to encourage spinach to wilt.: When you add the lemon juice , you will notice a fresh, tangy lift as it mixes with the pan juices, loosening browned bits from the bottom. Adding half of the spinach allows it to begin wilting into the hot pan without overwhelming the heat source, and covering the skillet traps steam, speeding the process while keeping color vivid. After about 2 minutes the leaves should have softened and released a little moisture that mingles with the lemony sauce. A common error is leaving the lid on too long, which steams the chicken and greens into a soggy texture, so check early.
Add the remaining half of the spinach, and stir to combine until wilted.: The second addition of spinach folds in quickly and evenly, bringing a lush green visual and a delicate earthy note to the dish. Stirring helps each leaf touch the warm pan and gently wilt, preserving some structure so the greens do not become a limp mass. You will notice the volume shrink dramatically as the leaves soften. Avoid over stirring once fully wilted, because aggressive handling can bruise the leaves and make them watery.
Add the chicken, spinach, and all cooking juices to the pot with the cooked pasta, and stir to combine.: When you transfer the scented chicken and wilted spinach into the pot, the mingling aromas intensify, and the starchy pasta soaks up those savory, lemony juices. Using a large pot makes tossing easier, ensuring each piece of pasta gets a bit of sauce and bits of garlic . The sound will be a soft shuffling as ingredients combine, and visually you will see the pasta take on a light sheen. A misstep here is waiting too long to combine, which allows the pan juices to cool and makes the dish less cohesive.
Add the basil, remaining 2 tablespoons olive oil, and stir to combine. Serve immediately. Recipe will keep airtight in the fridge for up to 5 days.: Finishing with minced fresh basil and the remaining olive oil brings a fragrant lift and glossy finish. The basil aroma will hit first, followed by the warm citrus notes, and the oil smooths the texture so each forkful glides. Serve right away so the herbs stay alive and the pasta remains warm. One common mistake is letting the dish sit too long; the herbs will fade and the pasta will firm up as it cools, reducing the fresh impression. Store airtight in the fridge for up to 5 days if needed.