1. Preheat oven to 350°F.
2. Grease a 9x13” casserole dish and add the bread cubes.
3. Measure ¼ cup evaporated milk into a glass microwave safe mixing bowl and set aside for the caramel sauce.
4. In a second mixing bowl, add the remaining (1 ¼ cups) evaporated milk, eggs, sugar, 4 tablespoons melted butter, 2 teaspoons vanilla, cinnamon, salt, and nutmeg and mix well.
5. Pour over the bread cubes and toss to make sure bread is evenly coated with liquid.
6. Slice 2 bananas and gently tuck the banana slices into the bread mixture. Set aside for 10 minutes to allow to bread to soak up most of the liquid.
7. Place the casserole dish into the oven and bake for about 40 to 50 minutes. The pudding is done when the top is golden brown and the middle is set.
8. Remove from the oven and allow to cool for 10 minutes.
9. Make Caramel Sauce: add the brown sugar, remaining butter, ½ teaspoon vanilla to the ¼ cup evaporated milk in the mixing bowl and heat in the microwave in 20 second intervals, stirring in between until the sauce has boiled and the sugar has dissolved.
10. Serve the banana bread pudding with slices of banana and caramel sauce on top.