Add cut potatoes, chicken broth, and half of the seasoning
Place green beans on top, add remainder of the seasonings, and place lid on pot, and make sure valve is on sealing position
Pressure cook for 3 minutes on high pressure, and do a quick release or gradual quick release when pot beeps. When pin drops, remove lid, add butter if desired, and stir everything together before serving
Notes
Use 1 cup broth or water for 6 quart and 1 ½ cups of liquid for the 8 quart. Cook for 3 minutes for crisper beans and potatoes and 4 minutes if you like them a little softer.