Preheat oven to 300°F on low fan.
In a small saucepot, combine oil, honey, brown sugar, cinnamon and salt. Bring to a boil.
In a large mixing bowl, combine the rolled oats, squash seeds and blitzed walnuts. Pour the hot liquid over the oat mixture.
Using a rubber spatula, fully incorporate all the ingredients. Once mixed, spread evenly onto a well-greased, parchment-lined sheet tray. Sprinkle peppercorns evenly over the tray.
Bake for 10 minutes. Stir, rotate the pan and bake for another 10 minutes. Stir, and rotate once more, then cook for a final 10 minutes. Remove from oven and generously season with fennel seeds and mix. Spread back into a thin layer and let cool at room temperature. Once cool, store at room temperature for up to a week.