Instructions: Preheat oven to 350 degrees and lightly grease and flour a 10 inch tube pan.

Put butter in large bowl and beat for several seconds. Add sugar and beat until smooth. Add eggs and lemon zest and beat for 2 minutes, until light and creamy.

In a separate bowl, combine flour, baking powder, soda, salt and blueberries; mix with a whisk or fork to blend. Add flour mixture to butter mixture and beat until smooth. Add yogurt and mix well.

Spoon batter into prepared pan and bake 50 minutes until a toothpick inserted into the center comes out clean. Let cake rest 5 minutes in pan, then invert over a plate to unmold.

To make glaze, mix ingredients until smooth. Spread over warm cake and serve.

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