Begin by setting your Instant Pot to the Sauté mode. Add the extra virgin olive oil and allow it to heat until shimmering, which should take about 1 minute.
While the oil is heating, season the diced chicken breast generously with sea salt and freshly cracked black pepper. Once the oil is ready, add the seasoned chicken to the pot. Sauté for approximately 5 minutes or until the chicken is golden brown on each side.
Next, add the minced garlic to the pot and sauté for an additional 1-2 minutes, stirring frequently until the garlic becomes fragrant but not burnt.
Carefully pour the chicken broth into the pot, using a wooden spoon to scrape the bottom to deglaze and lift any flavorful brown bits stuck to the pot.
Gently add the fettuccine pasta to the pot, ensuring it is fully submerged in the broth. Avoid stirring at this stage to prevent clumping.
With the pasta added, press the Cancel button to stop the sauté mode. Close the lid securely, ensuring the steam release valve is set to the sealing position, and select the Manual or Pressure Cook setting for 8 minutes.
After the cooking time elapses, perform a quick release of the pressure by carefully turning the valve to venting. Once all the steam is released, open the lid cautiously.
Stir in the heavy whipping cream, grated Parmesan cheese, and Italian seasoning blend. Mix well until the cheese is fully melted, and the sauce reaches a creamy consistency.
Taste the dish and adjust the seasoning with additional salt and pepper if needed. Allow the Alfredo to sit on the Keep Warm setting for about 5 minutes to thicken slightly.
Notes
For a touch of elegance, garnish with fresh parsley and extra Parmesan cheese.