Preheat oven to 325 F.
Grease or spray a 10 inch cake pan or or 11 x 7 inch baking dish and set aside.
Wash, peel and chop apples and place them in a small mixing bowl. Add the lemon juice, sugar, cinnamon, and nutmeg. Toss to coat well and set aside, stirring them occasionally
In a medium bowl, whisk together flour, cornmeal, baking powder, baking soda, salt and cardamom and set aside.
Add eggs and buttermilk to a large mixing bowl. Beat or whisk them together until they are fully blended and smooth. Slowly pour in the oil, continuing to whisk until smooth. Add the flour mixture to the egg mixture and mix well. Add the apples and any accumulated juice and stir them into the thick batter. Transfer the batter to your prepared cake pan or baking dish and smooth the top.
Bake at 325 F for 35-40 minutes or until cake is turning golden and a tester comes out clean. Allow to cool a serve as desired.