Ricotta Cheese Pie

1 1/2 cups ricotta cheese
2 eggs
1 teaspoon vanilla extract
1/2 cup white sugar
1 1/2 cups milk
2 tablespoons cornstarch
1 - 9 inch unbaked pie shell
ground cinnamon
                   
1. Dissolve cornstarch in 1/2 cup milk. 
2. Combine cornstarch and milk with ricotta, remaining 1
   cup milk, eggs, vanilla, and sugar. Mix until well
   blended. Pour filling into unbaked pie shell. 
3. Bake at 350 degrees F for 1 hour, or until a knife
   inserted into center comes out clean. Sprinkle top
   with cinnamon, and cool.