After soaking and dehydrating the oats, you should have about 6 cups. In a very large bowl, combine all dry ingredients.
In a small bowl, combine the melted oil, sweetener and vanilla. Add this mixture to your dry ingredients and mix very well with clean hands.
Spread the granola onto 2 large baking pans in a thin layer, and bake for about 10 minutes at 325°F (165°C). Stir, and continue baking for a few more minutes just until golden brown. The granola will continue to crisp up as it cools down. Store in an airtight container for up to 2 weeks.