Preheat oven to 425°F and adjust the oven rack to the middle position.

In a large bowl, stir together sour cream and basil. Add the fresh mozzarella, provolone, parmesan, salt and pepper and stir to combine.

Spread mixture into small 8x8 inch pan or casserole or pie dish. Sprinkle with tomatoes.

Bake for 25 minutes or until cheese has melted and starts to bubble around the edges. Turn oven to broil and broil for 3-5 minutes to get golden brown on top if necessary. Watch closely to make sure it doesn't burn. Serve warm with RITZ Crackers.