In a small bowl, combine 1/2cup honey,1/3 cup melted margerine, the corn syrup, lemon juice and lemon zest. Stir in1/2 cup walnuts pour into a well greased10by 10 ×2 in baking pan; put aside.
In a blender, finely grind your oats. Transfer to a large bowl. Stir in flour, light brown sugar, 1/2 cup nuts, the baking powder, baking soda and salt. Make a well in center of dry ingrdients. In a medium bowl. Combine buttermilk, eggs, 1/4 cup melted margerine and the vanilla. Add the milk mixture to the flour mixture stir just until moistened it should be lumpy.
Pour batter mixture slowly over honey mixture in pan. Bake at 375 f for 25 min make sure its done by inserting a toothpick see if it comes out clean. Remove from oven when done an invert it on a large plate . Cool 8 min and serve ummmmm