Turn the pressure cooker on to the Sauté setting. When the pot is hot, add the olive oil and the butter. Then add the onion and bay leaf. Stir.
2 teaspoons Olive Oil, 1 Tablespoon Butter, 1 small Onion,, 1 Bay Leaf
Add the carrot, celery, and garlic. Cook for a few minutes, scraping the bottom of the pot to get up any brown bits (deglaze).
1 cup Carrots,, 1 cup Celery,, 3 large Garlic Cloves,
Add the salt, pepper, poultry seasoning, sage, thyme, and rosemary. Cook for a few seconds to let the herbs & spices become fragrant.
1 teaspoon Salt, ½ teaspoon Black Pepper, ¼ teaspoon Poultry Seasoning, ½ teaspoon Sage,, 4 sprigs Fresh Thyme,, 1 4" sprig Fresh Rosemary,
Add the chicken broth. Put a glass lid on the pot and let the contents warm up to barely a simmer.
4 cups Chicken Broth,
Add the potato and chicken and stir.
1 large Potato,, 1 ½ lbs Chicken Thighs, and/or Breasts,
Add the dumplings.Homemade: Drop heaping teaspoonfulls into the broth (not too large as they need to cook through, and they expand).Biscuits: Add the sliced biscuits into the broth and gently stir to distribute them. Cancel the Sauté function.
Place the lid on the pot and lock in place. Turn the steam release knob to the sealing position.
Press the Pressure Cook/Manual button (or dial) and then the + or - button (or dial) to select 7 minutes.
When the cooking cycle has finished, do a Controlled Quick Release of the steam/pressure. Start by using a wooden spoon or other long handled utensil to turn the steam release knob towards Venting, and start letting the steam out gradually.Do this several times, and back off if any of the sauce starts to spew out with the steam. Then open it all the way when you feel certain only steam will be coming out. It will take a couple of minutes to fully vent. When the pin in the lid drops down, open the lid carefully, and stir in the frozen peas or mixed vegetables. You may need to push the dumplings aside if you made the fluffy kind.
1 cup Frozen Peas
Stir in the heavy cream (if using) and put the glass lid on to let it sit and heat through for 3-5 minutes.
½ cup Heavy Cream
Taste and adjust salt, if needed.
Serve.