Preheat the oven at 180°C. In a medium bowl, combine rolled oats, almond flakes, whole almonds, pecan halves, cashews, pistachio kernels, chia seeds, coconut flakes and salt.
Mix maple syrup and coconut oil in a small bowl. Add vanilla extract and stir all the ingredients together. Pour this mixture over the oats and stir.
Spread and flatten the oats mixture on a baking sheet lined with a silicone baking mat or parchment paper, and bake for 5-7 minutes. Remove from oven and stir the oats around. Return to the oven and bake for an additional 5-7 minutes.