1 Completely line a 4 x 8-inch loaf pan with plastic wrap. Set aside.2 In small saucepan, over medium high heat, bring maple syrup to boil.3 Boil for 3 minutes; remove from heat. Stir in chopped California Walnuts and maple extract and let cool completely.4 In a bowl, stir together softened ice cream with maple walnut mixture until combined thoroughly. Spread 1-1/2 cups of the ice cream evenly in the bottom of the prepared loaf pan.5 Fit 3 slices of banana bread in an even layer over ice cream. Repeat layers. Fill in any holes with remaining ice cream and spread evenly over top.6 Cover with plastic wrap and secure with a layer of foil. Place in the freezer until solid, at least 6 hours and up to 2 days. When ready to serve, cut into 12 slices.