For toast: Butter large baking pan and arrange bread slices in a single layer. Combine eggs, milk, 1/2 cup maple syrup, vanilla and cinnamon in bowl and beat to blend. Pour over bread. Let soak until egg mixture is absorbed, turning bread after 10 minutes, for about 25 minutes. Preheat oven to 425 degrees. Bake 15 minutes; turn and bake until golden (about 10 minutes longer). 3-4 servings.
While bread is baking: Combine maple syrup and cinnamon in small saucepan. Bring syrup to simmer. Remove from heat and spoon over french toast.