Start by cooking the fettuccine pasta according to package instructions. Drain and set aside, reserving 1/2 cup of pasta water.
Season the chicken breasts with salt and pepper. In a large skillet, heat olive oil over medium-high heat, and add the chicken. Cook for about 6-7 minutes per side or until fully cooked and golden brown. Remove from the skillet and let rest before slicing into strips.
In the same skillet, add minced garlic and cook for about 1 minute until fragrant.
Pour in the heavy cream, stirring well to combine. Bring to a gentle simmer and then add the basil pesto, mixing until fully incorporated.
Add the halved cherry tomatoes to the sauce, allowing them to soften slightly for about 3-4 minutes.
Combine the cooked fettuccine with the creamy pesto sauce, adding a bit of the reserved pasta water to reach your desired creaminess.
Toss in the sliced chicken and mix until evenly coated with the sauce.
Finally, stir in the grated Parmesan cheese, ensuring it's melted and integrated into the dish.
Adjust seasoning with salt and pepper as needed.
Notes
Serve in a large bowl, garnishing with fresh basil leaves and additional grated Parmesan.