Toss the blueberries with the lemon zest.
Make the streusel by combining the granulated sugar, all purpose flour and melted butter.
Make the cake batter. Pour the batter into an 8 inch springform pan. Layer with the blueberries, followed by the streusel.
Bake for 40-45 minutes at 350 degrees Fahrenheit. Let cool, top with ice cream/powdered sugar/whipped cream and enjoy!