These dessert treats can also be grilled on the barbecue.
2 cups flour
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup butter
1 cup sugar
2 eggs, slightly beaten
2 cups very ripe mashed bananas (about 4 bananas)
1/2 cup Nutella or peanut butter
1/4 cup mascarpone
1/4 cup butter
Preheat oven to 350 F.
Combine flour, baking soda and salt in a bowl. Set aside.
Cream together butter and sugar until light and fluffy. Beat in eggs one at a time. Beat in half of the reserved flour mixture. Beat in bananas and then beat in remaining flour mixture until just combined.
Pour batter into a greased 9 by 5-inch loaf pan and bake for 60 to 70 minutes or until a toothpick inserted in the centre of the cake comes out clean. Let cool in pan for 5 minutes and then turn it out onto a cake rack. Cool fully and cut into 8 slices, about ½-inch thick.
Combine Nutella and mascarpone. Spread one slice of banana bread with Nutella mixture, top with a second slice and press down to compress slightly. Repeat with remaining slices and filling.
Heat a large skillet over medium heat. Add 2 tablespoons butter and, working in batches, grill sandwiches until golden, about 2 minutes on each side, adding more butter as needed. Cut sandwiches in half and serve at once with ice cream.