Place flour, poultry seasoning and salt into a zip-top plastic bag and shake to mix. Add chops and shake until they are lightly coated.
Heat a heavy skillet large enough to hold all the chops over medium high heat, adding the oil until it shimmers. Place the chops into the pan and saute 2 - 3 minutes per side until golden brown.
Remove chops from the pan and, still on the heat, add 2 tablespoons flour mixture from the plastic bag into the skillet, stirring a few seconds to cook the flour. Add about ½ cup of the broth to the skillet and cook and stir to lift any browned bits from the pan. Add the remaining broth to the pan and turn off the heat. Reserve the remaining flour mixture for later.
Place the onion into the bottom of the slow cooker and lay the pork chops on top. Pour the liquids from the pan over the chops, cover and cook on high 2 hours.
Open the cooker and ladle out about ¼ cup of the resulting juices into a small bowl. Stir in the remaining flour mixture from the plastic bag into the juices until completely smooth. Return this mixture to the slow cooker, stirring to mix. Cover and continue to cook 30- 45 more minutes.
Serve with mashed potatoes, using the sauce in the pot as gravy.
Note: This recipe and picture are from Recipe Lion.