1 sm. to med. sized pumpkin
1 med. onion, chopped
1 1/2 lbs. ground beef
2 tbsp. soy sauce
2 tbsp. brown sugar
1 (4 oz.) can mushrooms, drained
1 can cream of chicken soup
1 1/2 c. cooked rice
1 (8 oz.) can water chestnuts, drained and chopped