Dinner in a Pumpkin

1 medium pumpkin, with top cut off (save top) and seeds and fiber removed
1 1/2 lbs hamburger, browned and drained
1 med onion, diced and cooked in with hamburger meat
2 tbs soy sauce
2 tbs brown sugar
1 4-oz can sliced mushrooms, drained
1 can cream of chicken soup OR cream of mushroom soup
1 1/2 cups cooked rice
1 8-oz can sliced water chestnuts, drained

Stir into pan of drained hamburger meat and onions the soy sauce, brown sugar, mushrooms and soup. Simmer for 10 minutes, stirring occasionally. Add cooked rice and water chestnuts. Spoon mixture into pumpkin, replacing top. Place on a baking sheet. Bake at 350 degrees for 60-90 minutes or until pumpkin is tender. Be sure when you serve your dinner to scoop out some of the cooked pumpkin with the filling.