Preheat oven to 135F. Line a large baking tray with parchment.
Arrange thin slices of banana bread in a single layer on the tray. I used about 3/4 of the banana bread and sliced it into 13-14 slices.
1 loaf banana bread
In a saucepan over low to medium heat, melt butter and brown sugar together. Simmer 6 to 8 minutes until thickened and amber.
142 g 10 tablespoons butter, 3/4 cup 3/4 cup
Pour caramel evenly over the banana bread.
Bake 8 to 10 minutes, until the entire surface is bubbling.
Scatter the broken Tony's bar and dark chocolate chips over the top. Let sit 2-3 minutes, then spread into a layer.
180 g Tony's Chocolonely milk chocolate caramel sea salt, 1/3 cup dark chocolate chips
Sprinkle with toasted walnuts and flaky sea salt.
1/3 cup toasted walnuts, Flaky sea salt
Cool 10 minutes at room temperature, then chill in the fridge at least 2 hours or until set.
Break into pieces and serve cold.