Preheat the oven to 160°C and line a large baking sheet with parchment paper.
In a mixing bowl, combine the oats, salt and cinnamon.
Add the oil, honey/maple syrup. Mix well.
Scatter the mixture onto the sheet, then spread it out, slightly pressing it down with the spoon.
Bake for 10 minutes, until lightly golden, then stir and add the pistachios.
Bake for another 10 minutes.
Turn off the oven, add the cranberries and put it back in the oven for 5 more minutes.
Take it out of the oven and let it cool completely in the tray, then transfer it to a jar.
You can store it for about a week.