Preheat the oven to 300 degrees F.
In a large bowl, combine the dry ingredients.
In a smaller bowl, whisk together the wet ingredients.
Pour the wet ingredients into the dry ones and mix well.
Pour the mixture onto a large rimmed baking sheet or into two 9" x 13" pans. Spread evenly into a single layer.
Bake for 45 to 60 minutes, or until slightly golden, stirring two or three times during baking.
Remove granola from oven, and stir in the chopped apples, if using.
Let the pan sit on the counter until the granola is completely cooled; it will crisp up as it cools.
Store granola in a large glass jar for up to two weeks in your pantry.