Filling:

1. In a medium bowl, combine cream cheese, sugar, 1 tablespoon flour, egg and orange zest; beat until smooth.  Set aside.

Glaze:

1. Stir together the glaze ingredients and set aside.

For the bread:

1. Cream butter and 1/2 cup sugar until fluffy. Add salt and vanilla. Add egg yolks (save the egg whites as you’ll need them later) to the sugar mixture; beat until creamy. Set aside.
2. In another bowl, combine flour (1 1/2 cups) and baking powder. Add this mixture, alternately with milk to egg yolk mixture.
3. Coat berries with 1 tablespoon flour and add them to the batter.
4. In a separate bowl, beat egg whites until soft peaks form. Add 1/4 cup sugar, 1 tablespoon at a time, and beat until stiff peaks form. Fold egg whites into batter.
5. Pour 1/3 of the batter into a floured and greased bread pan. Layer the filling over the batter and then finish with remainder of batter. This will create a layer of “cheesecake” between the blueberry batter.
6. Pour glaze over top of unbaked loaf and bake at 350F for 55-60 minutes.