Blueberry Goat Cheese Tart

1/2 lb softened goat cheese
1/2 cup white sugar
3 eggs, beaten
1 teaspoon orange zest (grated)
1 teaspoon vanilla
1/2 cup sour cream
1 cup fresh blueberries

In a mixer beat smooth the goat cheese, sugar and vanilla, scrape down the sides of the bowl often.
Blend in the egg and again beat until smooth and scrape the sides again as you go along.
Add sour cream to the mixture.
Strain the mixture through a sieve and then add the orange zest.
Arrange the berries on a prebaked shortbread crust shell.
Pour the mixture into the crust and bake 350 for 30 minutes.