Preheat the oven to 350°F. Lightly grease a 9″x5″ loaf pan.
In a mixing bowl, whisk together the flour, baking powder, baking soda, ground cardamom and salt.
In another mixing bowl, mix together oil, flaxseed meal and mango puree until well blended.
Add the dry ingredients to the wet ingredients along with the almonds/ cashews. Mix well.
Pour into the prepared pan and bake for about 45 minutes or until a toothpick inserted into the center of the bread comes out clean.
Set the pan on the wire rack to cool for 10~15 minutes. Then remove onto a wire rack to cool completely before slicing.