Spread peanut butter on slices of bread and top with banana slices to make 6 peanut butter and banana sandwiches.
Place the Captain Crunch in a heavy plastic bag and seal. Crush with a rolling pin and pour into a pie pan or a shallow dish. Set aside.
In a large shallow bowl, whisk together eggs, milk, sugar, cinnamon and vanilla until well blended to create a French Toast mix.
Heat oil on medium/high heat in a large pan on the stove.
Dip each side of the sandwich into the French toast mix.
Coat both sides of each sandwich with Captain Crunch crumbs.
Place sandwiches in the hot oil and cook for 5 to 10 minutes on each side, until crumbs begin to turn brown.
Place each Peanut Butter and Banana French toast on a plate and garnish with powdered sugar.
Serve with butter and maple syrup (if you like it extra sweet!).