Step 1: Saut Aromatics: Turn the electric pressure cooker to the "Saut" setting. Add olive oil and heat. Add chopped onion and cook until softened, about 3 minutes. Add minced garlic and cook for another minute until fragrant.
Step 2: Brown the Chicken: Add the chicken pieces to the electric pressure cooker and cook until lightly browned on all sides. It does not need to be cooked through at this point.
Step 3: Add Pasta and Liquids: Add the uncooked pasta, chicken broth, cream of chicken soup, milk (or half-and-half), Italian seasoning, salt, and pepper to the electric pressure cooker. Stir to combine, ensuring the pasta is mostly submerged in the liquid.
Step 4: Pressure Cook: Secure the lid of the electric pressure cooker, ensuring the valve is set to "Sealing." Select the "Manual" or "Pressure Cook" setting and set the cooking time to 5 minutes.
Step 5: Release Pressure: Once the cooking time is complete, allow the pressure to release naturally for 10 minutes. After 10 minutes, carefully perform a quick pressure release by moving the valve to the "Venting" position.
Step 6: Stir in Cheese and Vegetables: Remove the lid and stir in the grated Parmesan cheese and any optional frozen vegetables (if using). Allow the vegetables to heat through from the residual heat, about 2-3 minutes. The sauce will thicken as it cools slightly.
Step 7: Serve: Serve hot, garnished with additional Parmesan cheese and fresh herbs, if desired.
Optional Tips: For a creamier sauce, use heavy cream instead of milk. Add a pinch of red pepper flakes for a touch of heat. Spinach, broccoli florets, or sun-dried tomatoes can be added for extra flavor and nutrients. Use different types of pasta, such as rotini, penne, or bowtie, based on preference. Consider using pre-shredded rotisserie chicken to save time.