Chop the drained sun-dried tomatoes into strips. (Skip this step if your tomatoes are already sliced.)
Cut the chicken breasts into small cubes.
Set the Instant Pot to Sauté.
When the display reads “HOT”, add reserved oil from sun-dried tomatoes.
When the oil is hot, put cubed chicken and brown for couple minutes.
Stir in basil paste, garlic paste, Italian seasoning and salt. Cook for another minute, stirring occasionally.
Pour ½ cup of chicken stock and stir with a wooden spoon, scraping the bottom of the pan to deglaze.
Add sun-dried tomatoes and remaining chicken stock. Mix everything.
Add tortellini. Push down the pasta without stirring. (It's ok if they are not completely covered.)
Close the lid and make sure the valve is set to “sealing”.
Set the Instant Pot to Pressure Cook/Manual for 5 minutes on high. (NOTE:It took 9 minutes for my IP to come to pressure.)
Do quick release by carefully turning the valve to venting. And carefully open the lid.
Add heavy cream, parmesan cheese and spinach, if using. Cover and let sit for a minute. (NOTE:It'll appear a bit soupy, but the sauce will get absorbed in pasta and thicken as you stir.)
Mix well and serve.
Notes
This recipe has been tested in my favorite Instant Pot DUO 6qt.Note 1: You can substitute 2 tablespoons of fresh chopped basil leaves.Note 2: Warm up chicken stock in microwave while working on step 1-6. It helps to expedite the time for Instant Pot to come to pressure. You'll save at least 5 minutes!!Note 3: You can use frozen, refrigerated or dry tortellini. Any short pasta works too.Storing Tips: - Store leftover Tuscan chicken tortellini in an airtight container in the refrigerator for up to 3-4 days. - Reheat leftovers in the microwave or in a skillet or pot over medium heat on the stove. If the sauce becomes a bit too thick for your liking, add a splash of milk or heavy cream to freshen it back up. - I don’t recommend freezing this recipe! The dairy doesn’t thaw well, and the tortellini is likely to be mushy once thawed.