Start by bringing a large pot of salted water to a rolling boil. Toss in your pasta and cook according to package directions until you hit that al dente texture. While that's happening, get your chicken diced into bite-sized pieces so everything cooks evenly and fast.
Heat your olive oil in a large skillet over medium-high heat. Once it's shimmering (you'll see it move easily in the pan), add your diced chicken in a single layer. Let it sit for 2-3 minutes without stirring so it gets those golden edges.
Stir the chicken around and cook for another 4-5 minutes until the pieces are cooked through but still tender inside. Don't crank the heat too high or it'll get rubbery fast—I learned that the hard way on a Tuesday night years ago. Season with salt and pepper as you go.
Toss in your minced garlic and cook for about 30 seconds until the kitchen smells absolutely amazing. This is where the magic happens—that garlic scent tells you you're doing it right.
Add your pesto sauce directly to the skillet with the cooked chicken. Stir everything together so the sauce coats all the chicken pieces evenly. Heat it through for about 1-2 minutes, but don't let it bubble aggressively or the basil loses its brightness.
Drain your pasta and add it to the skillet with the pesto chicken mixture. Toss everything together gently so the pasta gets coated without breaking apart. Sprinkle in your lemon zest and pine nuts, then toss again.
Divide your pesto chicken pasta family portions into bowls and top each one with cherry tomatoes, fresh torn basil, and Parmesan cheese. Serve it immediately while everything's still warm and the basil flavor is at its peak.