Preheat the oven to 175 degrees Celsius.
Grease four muffins pans (or one larger loaf pan, or muffin tins).
Add the ingredients for the almonds paste to a high speed blender and mix until smooth.
In a bowl whisk together eggs and sugar until they start to look fluffy and pale.
Add yogurt, apple sauce, vanilla extract and whisk just until combined.
Grind the cardamom seeds in a coffee grinder or mortal.
Combine oat flour, almond flour, cardamom, salt and baking powder in a separate bowl.
Pour dry ingredients into the wet, whisk gently just until combined.
Pour half of the batter into the prepared molds.
Add about 1/4-1/3 of the almond paste in the middle lengthwise, top with the rest of the batter. (Save the rest of the almond paste for later).
Place in the oven, bake for 16-20 min. Remove from the oven, let them cool completely.
Whisk cream together with powdered sugar until soft peaks form.
Spread or pip the remaining almond paste over the top of the muffin loafs.
Next spread or pip the whipped cream over the almond paste.
Top with ground cardamom, chopped almonds and powdered sugar.