Preheat a Belgian waffle iron to medium-high. In a large bowl, whisk together the pancake mix, salt, cinnamon, egg, oil, milk, mashed banana and vanilla. Add the chocolate chips; stir till just combined.
Grease the waffle iron with non-stick cooking spray. Pour a heaping 1/3 cup batter into each waffle iron quarter, spreading the batter out to the edges. Close and cook until the waffle is crisp and the waffle iron stops steaming, about 4 mins. Repeat with the remaining batter. To serve, top the waffles with banana slices, walnuts and hot fudge.