In a 5 quart pot, saute onion, celery, and green pepper until tender.
Add ground beef back in pot and add tomatoes with puree. Add water.
Add seasonings chili pepper and garlic power, onion power, salt and pepper.
Cook 2 hours until heated though.
Add mushrooms and kidney beans the last 30 minutes of cooking and heat though. Serve.
Notes: You can add hot peppers to the chili if you want to, he does. You can also add crushed tomatoes without puree, it will be more like a soup. My husband just uses crushed tomatoes with juice. This above is more thicker but still good.