Slice the banana bread into 10-12 slices and set aside. Preheat griddle to medium-low heat. (see notes)
In a medium bowl, whisk together the eggs, vanilla extract, almond extract, cinnamon, and nutmeg. Once the cinnamon is incorporated into the eggs, whisk in the milk. Submerge a piece of banana bread in the egg mixture, coating all sides.
Place the bread on your hot griddle and cook until each side is nicely browned and hot, about 3 minutes per side but will depend on your griddle. Repeat for each piece of bread, cooking in batches as necessary.
Serve hot/warm with pure maple syrup and garnish with chopped walnuts and slices of banana.
I use a large double electric griddle with a non-stick copper surface so I don’t add butter before cooking the French toast. You can certainly cook the French toast in melted butter if you prefer. Definitely generously grease your pan if your pan/griddle if it does not have a non-stick surface.
My griddle cooks 8 pieces at a time, keep cooked French toast warm if you’re cooking in batches.