In a large bowl mix together whipping cream, eggs, 1/2 tablespoon cinammon, 1/2 tablespoon vanilla extract, sugar, and salt.
dip each bread slice into the mixture and then turn it over to coat the other side.
Melt a little butter in a frying pan over medium heat and cook the toast, one side at a time until golden brown. Set aside.
Melt 1/2 cup of butter in a saucepan over medium heat. Add the sugar and mix well. Let simmer for one minute. Add the heavy cream, 1 teaspoon of cinnamon, 1 teaspoon of vanilla extract, bananas and stir well. Continue cooking for about 3 minutes.
Serve the sauce on top of the french toast. Top with whipped cream if desired.