Lemon Pork Chops(Pressure Cooker)  
["4 to 6 pork chops", "2 tsp. shortening", "4 to 5 lemon slices", "1 onion, separated into rings", "salt and pepper", "1/2 c. ketchup", "1/2 to 1 c. water"]
["Brown chops in shortening.", "Top each with lemon slice, onion, salt and pepper.", "Combine ketchup and water; pour over chops. Close cover, cook 15 minutes.", "Cool at once.", "Serve chops with sauce."]
["pork chops", "shortening", "lemon slices", "onion", "salt", "ketchup", "water"]