Place butter in a microwave safe bowl and microwave covered for 30 to 45 seconds or until melted. Stir in brown sugar, heavy whipping cream, cinnamon, allspice, and pecans. Add bananas and gently coat

Transfer to a ungreased 13 x 9 inch baking dish. Arrange bread over top trimming to fit as necessary.

Place remaining ingredients in a blender and process until blended. Pour over bread. Refrigerate covered for 8 Hours or overnight.

Preheat oven to 375° Meanwhile remove baking dish from refrigerator. Bake uncovered for 35 to 40 minutes or until a knife inserted near the center comes out clean. Let stand for 5 to 10 minutes. Invert slice and serve.