Delectable Apple Cake

This cake smells so friggen good when it's cooking, you won't even believe your nose. Lately I've been craving something fruity, and this was my first attempt at satiating that need. It's actually not what my belly was looking for specifically, but it made me smile a lot nonetheless.
The blurry cake you see before you has a nice, light texture and nice chunks of not-overcooked apples in it. The best part, in my opinion, is the crunch of the sugar on top.
I'm going to keep baking until I find what it is that I crave, after I finish off this whole cake by myself of course....

2 cups cubed granny smith apple
2 1/4 cups whole wheat pastry flour
1 T baking powder
2 tsp cinnamon
1/2 tsp nutmeg
1/2 cup brown sugar
1/2 tsp sea salt
2 eggs
1 cup buttermilk
1/4 cup melted butter
1 tsp vanilla
3 T large granule sugar

Preheat oven 400 degrees
Butter and flour 9 inch pan of some sort (I used a springform.)
Combine flour, baking powder, cinnamon, nutmeg, brown sugar and salt in a bowl.
Whisk together buttermilk and eggs, then add butter and vanilla.
Pour wet into dry and stir very lightly.
Fold in apples.
Spread into the pan and sprinkle sugar over the top.
Bake for about 20 minutes or until just cooked through.

(I drizzled this one with maple syrup when I served it, but I bet some whipped cream on top would be really tasty, too)
Serves about 12