Toss chicken with 1 tablespoon of fajita seasoning in a bowl.
Toss vegetables: onion and bell peppers, with 1 tablespoon of fajita seasoning in another bowl.
Click on Saute and select High, once it displays HOT add 2 tablespoons of olive oil and brown the chicken. Brown in batches, not to overcrowd the meat in the pot. Set aside the meat.
Add 1/4 cup of water to deglaze the pot. Scrape any bits that stuck to the bottom.
Add the remaining oil, and saute the vegetables, including the minced garlic.
Add back the chicken and stir to combine.
Cancel Saute function.
Distribute the pasta on top of the chicken and veggies, do not mix.
Pour the diced tomatoes on top of the pasta.
Pour the chicken broth on top.
Close and secure the lid. Seal the valve. Pressure Cook on High for 5 minutes followed by a quick release.
Open the lid, click on Saute, add the heavy cream and 1 cup of cheese and stir to combine.
Add salt and pepper to taste.
Serve with preferred garnishes.