In a large bowl, combine flour, baking soda, salt and sugar and stir to combine. Add the eggs, lightly beaten, buttermilk and melted butter and whisk well. It is perfectly fine to have some lumps in a pancake batter so do not labor it too much trying to get every last lump out.
Heat a griddle over medium heat, about 375F. Test to see if it is ready by sprinkling a few drop of water on the griddle. If the drops spatter about, it is ready. Spray with a non-stick regular or butter spray.
Make the pancakes, pouring a 1/2 cup of the batter onto the griddle. When you see bubbles appearing on the top and the top looks like it is starting to dry a little, flip the pancakes over until completely done. Do not try to increase the heat or they can easily burn while you are waiting for the inside to cook through. Serve the pancakes warm.
To serve, slice the bananas into cross ways at an angle if you like to be cute, followed by the walnuts and then drizzle liberally with the Buttermilk Caramel syrup