Add the chicken breasts, 1 Tbsp. olive oil, and half of all the seasonings to a large mixing bowl. Only use half of the seasonings. The other half is for the potatoes. Toss well to coat the chicken.
4 Chicken breasts, skinless
Press the "Sauté" function on your Instant Pot and add 1 Tbsp. olive oil once hot. Brown the chicken on both sides, 3-5 minutes per side.
While the chicken is browning, add the baby potatoes to a bowl along with the rest of the olive oil and seasonings. Toss well to coat.
1.5-2 lbs. Baby potatoes
Once the chicken is browned, remove it from the Instant Pot. Add the chicken broth and scrape any burnt bits off the bottom of the pot. This will prevent any burn errors while pressure cooking.
1 cup Low sodium chicken broth
Then add the potatoes to the pot first. Place the chicken breasts on top of the potatoes.
Close the lid and turn the vent to the "Sealing" position. Pressure cook on high pressure for 10 - 15 minutes. 10 minutes will mean the potatoes are still slightly firm, 15 minutes work for very soft potatoes.
Once the pressure cooking time has elapsed, quick release the remaining pressure by turning the vent knob to the "Venting" position. Once the pressure has released, open and remove the chicken and potatoes to a clean plate.
In a small bowl, mix together the cornstarch and water. Press the "Sauté" function and add the cornstarch slurry to the leftover cooking liquid in the pot.
2 Tbsp. Cornstarch, 1-2 Tbsp. Water
Stir well for 3 - 5 minutes while the sauce thickens and becomes gravy.
Serve the chicken and potatoes with the gravy along with fresh parsley and parmesan cheese.