1. Preheat the oven to 325 F and line a large baking sheet with a silicone baking mat or parchment paper. 
2. In a large mixing bowl, combine the oats, walnuts and cranberries.* In another bowl, melt the honey and Nutella together in the microwave for about 30 seconds, or until the mixture is quite runny.
3. Pour the honey/Nutella mixture over the oat mixture, and working quickly, use a large wooden spoon to thoroughly combine, ensuring all of the oats are covered. Spread the oats into an even layer on the baking sheet. Bake for 30-35 minutes, stirring the mixture every 10-15 minutes.
4. Remove the granola from the oven and allow it to cool completely; it’ll come out soft, but will crisp up as it comes to room temperature. Store in an airtight container!

Granola will keep for a few weeks in an airtight container at room temperature.