I'll bet you've never had Tiramisu like this before! This dessert has layers of banana bread, caramelized bananas, and mascarpone cream all wrapped up in an edible chocolate shell! These individual tiramisus are quite large, so they can serve two people. 

4 large eggs (at room temperature)

14 oz granulated sugar (2 cups)

2 1/2 oz packed brown sugar (1/3 cup)

24 oz mashed ripe bananas (3 cups, from about 6 bananas)

8 oz vegetable or liquid coconut oil (1 cup)

2 tsp vanilla extract

2 oz Greek yogurt or sour cream (1/4 cup)

13 3/4 oz all-purpose flour (3 1/4 cups)

2 tsp baking soda

2 tsp ground cinnamon

1/2 tsp salt

14 oz dulce de leche or sweetened condensed milk

1/4 cup milk

2 tbsp butter

1/4 cup brown sugar

1 tbsp rum (can substitute water or orange juice)

1 tsp vanilla extract

1/4 tsp cinnamon

4 large bananas (or 5 medium bananas)

6 egg yolks (at room temperature)

7 oz granulated sugar (1 cup)

1 lb mascarpone cheese

1/4 tsp salt

3/4 cup heavy cream

1 1/2 cups heavy cream

1/2 cup powdered sugar

Chocolate pearls or other chocolate decorations (optional)

1 lb chocolate candy coating or tempered chocolate (see here for tempering instructions. I don't recommend using plain chocolate that has been melted but not tempered)

Acetate cake collar strips (4" high)

Preheat the oven to 350 F and spray two 9x5-inch loaf pans with nonstick cooking spray. Combine the eggs and both sugars in the bowl of a large stand mixer fitted with the paddle attachment. Beat them on medium speed until well-mixed, then turn the speed to low, add the mashed bananas and mix them in. Finally, mix in the oil, vanilla extract, and G