Texas Taco Platter

2 pounds ground beef;1 large onion,chopped;1 can(14-1/2 ounces)tomatoes with liquid,cut up;1 can(12 ounces)tomato paste;1 can(15 ounces) tomato puree;2 T.chili powder;1 t.ground cumin;1/2 t. garlic powder;2t.salt;1 can(28 ounces) ranch-style-(pinto,etc.)beans,undrained;1 pkg.(10-1/2 ounces)corn chips;2 cups hot cooked rice.TOPPINGS:2 cups(8ounces)shredded chedder cheese;1 medium onion,chopped;1 head iceburg lettuce,shredded;3 medium tomatoes,chopped;1 can(2-1/2 ounces)sliced ripe olives,drained;1 cup picante sauce,optional.In a large skillet or dutch oven,brown beef and onion;drain.Add next seven ingredients;simmer for 1-1/2 hours.Add beans and heat through.On a platter,layer the corn chips,rice,meat mixture,cheese,onion,lettuce,tomatoes and olives.Serve with picante sauce if desired.Yield 10 to 12 servings. ENJOY!!!!!