Preheat your oven to 350 degrees.
Line or spray your muffin tins.
In a medium bowl, put your flour, cinnamon, cardamom, soda, salt, oats, and sugar, Whisk together.
Add to the dry ingredients your egg, pumpkin puree, vanilla extract, and applesauce. Mix together until all is combined.
Using a 1/4 measuring cup, scoop up muffin batter and pour into muffin tins, filling each tin about 3/4 full.
For your topping, mix 1/8 a cup of brown sugar with 1 Tbs cinnamon, then sprinkle on top of your muffins.
Bake for 20 to 25 minutes at 350 degrees or until a toothpick inserted in the middle comes out clean.
Cool on a wire rack in tins for a couple of minutes. Then carefully remove to wire rack to finish cooling or eat warm.