Preheat oven to 350.
Mash banana very well in large mixing bowl. Add in eggs and whisk. Once mixed, add in oil, maple syrup, peanut butter, and vanilla. Mix all wet ingredients until well combined.
Add in flour, cinnamon and baking powder. Mix well. Spray/ line a muffin tin / mini bread tin (12 count) with coconut oil spray. Evenly distribute batter among the 12 spots.
Place a small dollop of jam/chia jam/ fresh fruit on top of the batter. Using the back of a fork, mix in the jam in with the regular batter. Swirl it around a little too! Place in the oven and bake for 25 minutes. Cool and enjoy.