1 (10 ounce) package frozen blueberries, thawed
4 eggs
1/2 cup white sugar
1/2 teaspoon lemon zest
1 teaspoon vanilla extract
Preheat oven to 350 degrees F (175 degrees C). Grease and flour 2 (9 inch) pans.
Place blueberries in boiling water; stir. Remove from heat. Let cool slightly.
Beat eggs in small bowl, then add to white sugar mixture. Beat in lemon zest. Mix in vanilla extract. Pour into prepared pans.
Bake in preheated oven for 30 minutes, until lightly browned.