Preheat oven to 350 degrees F and grease a 9 x 5 inch loaf pan/tin. (I grease mine with olive oil spray). Line the pan with parchment paper.
In a large bowl, add the olive oil, eggs, mashed bananas, greek yogurt, sugar, and vanilla extract. Mix with a fork.
In another bowl, mix the flour, baking soda, and salt together.
Pour the bowl of dry ingredients into the bowl of wet ingredients.
Fold the blueberries and 1 Tablespoon of chia seeds into the batter. ( If adding frozen blueberries, do not thaw, just add them frozen).
Pour the batter into the lined loaf pan. Sprinkle 1 Tablespoon of chia seeds of chia seeds on top of the banana bread.
Bake for for 60-70 mins, until toothpick comes out clean. If you notice the top of the banana bread is getting too brown, top the banana bread with aluminum foil for the last 10-15 minutes of baking.