This is an old family favorite my grandmother used to make all the time. So yummy.
Porcupine Meat Balls (from Presto Pressure Cooker Recipe Book)
1-1/2 lbs ground beef
1/2 cup rice
1 tsp salt
1/2 tsp pepper
1 tbs minced onion
1 can tomato soup
1/2 cup water
Wash rice thoroughly.* Combine meat, rice, salt, pepper and onion. Use clean hands to mix and shape. Shape into small balls. Heat tomato soup and water in cooker. Drop meat balls in soup mixture. Close cover securely. Place pressure regulator on vent pipe and cook 10 minutes with pressure cooker regulator cooking slowly. Let pressure drop of its own accord.
*Place the 1/2 cup rice in strainer and let water run over it for 20 to 30 seconds, then dump it in the meat. DO NOT USE MINUTE RICE.