Banana Bread Ice Cream Loaf

Name: Banana Bread Ice Cream Loaf
Ingredients: Nonstick cooking spray, for the pan; 1 stick (8 tablespoons) unsalted butter; 1 3/4 cups all-purpose flour (see Cook's Note); 1/2 cup granulated sugar; 1 teaspoon baking soda; 1 teaspoon ground cinnamon; 1/2 teaspoon kosher salt; 1/4 teaspoon freshly grated nutmeg; 1/2 cup lightly packed light brown sugar; 1/4 cup sour cream; 1 teaspoon pure vanilla extract; 2 large eggs, lightly beaten; 4 soft, very ripe, darkly speckled medium bananas, mashed (about 1 1/2 cups); 1/2 cup toasted pecans, chopped; 1 cup granulated sugar; 3/4 cup heavy cream; 1 tablespoon unsalted butter; 2 ripe medium bananas, thinly sliced; 3 cups butter pecan ice cream; 3/4 cup toasted pecans, chopped