Jack O Lantern Casserole

(for an easy weeknight meal, you can forgo the whole pumpkin thing and bake in 9X13 until warmed through).
1 medium pumpkin
1 chopped onion
1 to 2 lb. ground beef
2 tablespoons soy sauce
2 tablespoons brown sugar
1 (4 oz.) can mushrooms (optional)
1 can cream of chicken soup
1 1/2 to 2 C. cooked rice
1 (8 oz.) can sliced water chestnuts

Clean out pumpkin and decorate outside with a black marker, if desired. Brown hamburger and onion. Mix in remaining ingredients.

Put pumpkin on cookie sheet. Fill pumpkin with mixture. Place in oven and bake pumpkin with lid on for 1 hour at 350F or until pumpkin is tender. Ladle on to plates out of the pumpkin.