In the Instant Pot, combine the chicken, green beans, peas (if using), onion, celery, carrots, butter, garlic, pepper, thyme, salt, and broth.
Secure the lid on the pot. Close the pressure-release valve. Select PRESSURE COOK OR MANUAL and set the pot at HIGH pressure for 2 minutes. At the end of the cooking time, allow the pot to sit undisturbed for 5 minutes, then release any remaining pressure.
Open the lid, stir in the evaporated milk, and serve.
Notes
Note: If you would like to use this as a filling for a pot pie, reduce the broth to 1[1⁄2] cups. You may also want to thicken with a cornstarch slurry. To make the slurry, in a small bowl, mix 1 tablespoon cornstarch and 1⁄4 cup water. Stir the slurry into the pot after the pressure has been released. Select SAUTÉ/Normal. Cook and stir 3 to 5 minutes or until thickened.
Per Serving Calories: 230 Total Fat: 11g Saturated Fat: 5g Sodium: 430mg Carbohydrates: 10g Fiber: 2g Sugars: 5g Protein: 24g