Here is what you'll need:
2 boneless, skinless chicken breasts
2 tablespoons olive oil
1 tablespoon sea salt
1 tablespoon ground black pepper
1 tablespoon cajun seasoning
8 ounces penne pasta
2 tablespoons unsalted butter
3 cloves garlic, minced
1 cup heavy cream, or more, to taste
1/2 teaspoon lemon zest
1/4 cup freshly grated Parmesan
2 tablespoons chopped fresh parsley leaves
In a gallon size Ziploc bag, add chicken, 1 tablespoon olive oil and cajun seasoning, shaking to coat thoroughly. Heat remaining 1 tablespoon olive oil in a grill pan over medium high heat. Add chicken and cook, flipping once, until cooked through, about 5-6 minutes on each side. Set aside and keep warm.
In a large pot of boiling salted water, cook pasta according to package instructions; drain well.Melt butter in a saucepan over medium heat. Add garlic, and cook, stirring frequently, until fragrant, about 1-2 minutes.Gradually whisk in heavy cream and lemon zest. Cook, whisking constantly, until incorporated, about 1-2 minutes.
Stir in Parmesan until slightly thickened, about 1-2 minutes. If the mixture is too thick, add more heavy cream as needed; season with salt and pepper, to taste. Stir in pasta and gently toss to combine. Serve immediately with chicken, garnished with parsley, if desired.