1 lb. hamburger
1/2 c. onions, chopped
1 (8 oz.) can tomato sauce
1/3 c. ketchup
1 tsp. sugar
3/4 tsp. oregano
1/3 c. Parmesan cheese
1 (8 oz.) pkg. cream cheese

Brown hamburger and onion in large skillet. Drain. Add tomato sauce, ketchup, sugar and oregano and simmer 10 minutes. Remove from heat and add cheeses until well blended. Serve warm with tortilla chips.