Fry hamburger with taco seasoning until burger is browned, add onions last minute of browning .
Drain juice from tomatoes, add enough water to make 2 1 /2 cups liquid
.Add tomatoes to burger
.Cook the rice in the tomato juice and water mixture.
When the rice is soft, mix with hamburger mixture.
Pour into 9 X 13 inch pan.
Mix together mayonnaise, sour cream, and cheese, and spread over hamburger mixture.
Make a batter of Bisquick and milk, and pour over top of sour cream mixture.
Bake at 400 for 30 minutes.Serves 15.