Preheat oven 375 degrees F. Line baking pan with parchment paper and lightly grease, set aside.
In a large bowl, combine crushed pineapple, applesauce, coconut oil, vanilla, and ground flaxseeds. Mix well.
Add sugar, brown rice flour, almond flour, baking powder and salt and mix well. Fold in blueberries.
Scoop batter into prepared pan, bake in an oven for 60 -75 minutes or until a fork inserted into the center comes out clean.
If needed, tent with foil for the last 15 minutes of baking to prevent excess browning on top of the bread.
Remove from oven and allow bread to cool for about 15 minutes in pan before removing to a wire rack to cool completely. Drizzle with pineapple glaze.