Banana Bread Waffles with Bananas Foster Sauce

Name: Banana Bread Waffles with Bananas Foster Sauce
Ingredients: Nonstick cooking spray, for the pan and waffle iron; 5 tablespoons unsalted butter; 1 1/4 cups all-purpose flour; 1 teaspoon baking soda; 1/4 teaspoon kosher salt; 1/8 teaspoon ground cinnamon; 3 overripe bananas; 1/4 cup granulated sugar; 1/4 cup light brown sugar; 1 large egg, beaten; Bananas Foster Sauce:; 1 stick (8 tablespoons) unsalted butter, cut into pieces; 3/4 cup light brown muscovado sugar; 1/4 cup dark rum; 1/4 cup heavy cream; 2 large ripe bananas, peeled and sliced into 1/2-inch pieces on the bias