Cinnamon Apple Spice Cake

1 1/2 c buttermilk
3/4 c canola
1/2 c water
2 c brown sugar
2 eggs
2 t baking powder
1 1/2 t cinnamon
1/2 t baking soda
1/2 t salt
2 t vanilla
2 1/2 c flour
2 gala apples

fruit topper:
2 T butter
4 apples or pears
1/4 c sugar