In a bowl, whisk together flour, sugar, cardamom & baking powder. In another bowl, combine mashed banana, papaya, oil & beaten egg.
Add wet ingredients to flour mixture, stirring gently, then fold in pistachios. Stir ONLY until batter is combined.
Put batter in muffin tray cups lined with paper cups, filling each to about 3/4 full. Top with remaining chopped pistachios.
Bake for about 18-20 minutes or until baked through. Remove from oven & let them cool in the tray for 10 minutes, then put the muffins on a wire rack to finish cooling.
Recipe Notes
This recipe makes either 7 large muffins or 14 medium size.