The night before or morning of the cooking day marinate the chicken breast. Cut the breasts in half lengthwise to make smaller breast portions if it's large. It will cook better. I added some other meats in the marinade at the same time because the sauce packet makes 3lbs of meat. You could also save the extra sauce for later.
When you're ready to cook chop the vegetables into large pieces about 1 inch cubes for the potatoes and 2 inch chops for the other vegetables. The potatoes usually take longer to cook.
Add 3/4 cup chicken broth to the instant pot. Add the chicken in first and close the lid. Make sure it's set to sealing for the top. Press the pressure cook button and cook on high or "more" pressure for 20 minutes with just the chicken. Release the steam seal with a towel.
Add all the vegetables in and put the lid back on. Set it to sealing and put on high pressure for another 5 minutes. After the 5 minutes, release the steam seal and it's done!