Preheat oven to 350 degrees. Spray 8 inch square pan with oil and dust with flour tapping out excess. Whisk together flour, almonds, cornmeal, baking powder. Beat eggs, sugar and zest with mixer on high setting until pale and fluffy. Reduce speed to low, slowly adding olive oil. Beat in flour mixture in 3 additions alternating with water, beginning and ending with flour. Spoon batter into pan and scatter 1 cup of grapes over top of cake. Bake for 15 minutes. Scatter remaining cup grapes over cake. Bake until cake is golden and a toothpick inserted into the center comes out clean 25-27 minutes more. Turn out and cut into squares.

Photo Courtesy of Katherine Martinelli