Preheat oven to 360°F (180°C).
Cut the tamarillos in half and scoop out the flesh into a bowl. Add 1/4 cup honey and use a spoon to break up any large chunks. Stir and let the mixture sit for 30 minutes to macerate.
In a large bowl, cream together the softened butter, honey, and vanilla until light and fluffy.
Add the eggs one at a time, beating well after each addition.
Fold in the cinnamon, orange zest and juice, then gradually add the sifted flour, baking powder, and almond flour, using a spatula to gently combine.
Pour the batter into a greased and lined springform pan or 8 Inch Tart Pan with Removable Bottom .
Spread the macerated tamarillo mixture evenly over the top of the batter.
Bake for 30 minutes.
In a small bowl, combine the melted butter, brown sugar, orange zest, cinnamon, and sliced almonds.
Remove the cake from the oven and sprinkle the topping mixture evenly over the top.
Continue baking for 20-25 minutes, or until a skewer inserted into the center comes out clean.
Let the cake cool slightly in the pan before transferring it to a wire rack to cool completely.
Serve with ice cream, whipped cream, or enjoy it on its own.