Preheat oven to 350°F (175°C).

Lightly brush bread slices with melted margarine.

Cut bread into 1/2-inch cubes.

Spread bread cubes on a cookie sheet.

Bake for 10 minutes, or until lightly toasted.

Transfer toasted bread cubes to a shallow 1.5-quart baking dish.

Add minced apples and walnuts to the baking dish.

Toss gently to combine bread, apples, and walnuts.

In a separate mixing bowl, combine lowfat milk, egg substitute, and vanilla extract.

Whisk together until well blended.

Add sugar-free vanilla pudding mix and 1/2 teaspoon of cinnamon to the mixture.

Whisk until thoroughly combined.

Pour the liquid mixture evenly over the bread, apple, and walnut mixture in the baking dish.

Sprinkle the remaining cinnamon over the top.

Bake for 30 minutes, or until golden brown and set.

Remove from the oven and let stand for 10 minutes before serving.