Taco soup

1 1/2 lb Ground beef
    1/2 c  Onion, chopped
     16 oz Tomatoes
     16 oz Kidney beans
      8 oz Corn
      8 oz Tomato sauce
      4 oz Mushroom
           -stems and pieces
      1 pk Taco seasoning
           -1 1/4-oz
      1    Avocado
           -peeled and diced
           Shredded cheese
           Sour Cream
           Corn chips
 
   In keetle, lightly brown beef and onion.  Stir in tomatoes, beans, corn,
  tomato sauce, mushrooms, and taco seasoning. Bring to boil and simmer 15 to
  20 minutes.
  
   To serve, garnish with choice of avocado, cheese, and sour cream.