Preheat oven to 300°F. Line two 11x17-in cookie sheets with parchment paper (a rimmed baking sheet works best).
Combine oats, brown sugar, walnuts, flaxseed, cinnamon and raisins in a large bowl. Stir until combined.
In a microwave-safe bowl add canola oil and honey. Heat in microwave for about 30 seconds on high. Add vanilla to bowl.
Pour oil/honey mixture over dry ingredients. Stir until all dry ingredients are coated with the liquid ingredients.
Cook for 10-11 minutes, stir and swap cookie sheets to the other rack (top to bottom/bottom to top so they cook evenly). Then cook for another 10-11 minutes or until oats are light-brown in color. Don’t overcook!
Let granola sit on cookie sheets for at least 30 minutes or until completely cooled. Then break it up into small pieces.
Serve with yogurt or milk and top with fresh berries!
Notes
This granola can be stored for up to a week in an air-tight container (if it lasts that long!).It makes a total of about 14 cups.