Preheat oven to 375F/190C. Line a baking sheet with parchment paper OR prep a large sized rectangular baking dish (15x10). You an also opt to use two smaller sized baking dishes. Just be sure to prep whatever you choose to use so the bars do not stick.
Grab a mixing bowl and begin to mash the banana until smooth. Stir in the non-dairy milk, apple sauce, apple cider vinegar, and vanilla extract and mix until smooth.
Stir in the remaining ingredients, including the chocolate or nuts/seeds and mix well. Pour into the baking dish or right onto a baking sheet lined with parchment paper and even out with a spatula.
Bake between 12-16 minutes. To check when the squares are done, simply insert a toothpick or sharp knife and remove. If it is clean with just a hint of moisture, then you are good to go. If the squares are not yet finised at the 16 minute mark, bring the heat up to 400F/200C for just a couple of minutes.
Let cool for 10 minutes before slicing and serving. I love to serve these with a drizzle of maple syrup, sliced berries, sliced bananas, crushed nuts, or even coconut shavings.
**I have yet to try blended up medjool dates with this one but if I was going to, I would add all of the wet ingredients PLUS the medjool dates into a food processor and blend until smooth. Then I would follow the recipe as stated. I'm sure this would be amazing!