Set the Instant Pot to the sauté mode and add the olive oil. Once hot, add the minced garlic and sauté for 1 minute until fragrant.
Season the chicken breasts with salt, pepper, and Italian seasoning. Add the chicken to the pot and sear for about 3-4 minutes on each side until browned (it doesn’t have to be cooked through).
Pour in the chicken broth, ensuring the chicken is submerged. Break the fettuccine in half and lay it on top of the broth without stirring.
Lock the lid of the Instant Pot and set it to manual high pressure for 8 minutes.
Once cooking is complete, quick release the pressure. Carefully remove the chicken breasts and set aside.
Switch the Instant Pot to the sauté mode again. Stir in the heavy cream and bring to a gentle simmer. Gradually mix in the grated Parmesan cheese until melted and smooth.
Shred the chicken with two forks and return it to the pot. Toss everything together until the pasta is well-coated with the Alfredo sauce.
Taste and adjust the seasoning with more salt and pepper if necessary.
Notes
Serve in a large bowl or plate, garnished with freshly chopped parsley and a sprinkle of additional Parmesan cheese on top for an inviting look.