Preheat the oven to 170°C (338°F).
Mix oats, nuts, and seeds together in a bowl.
Add olive oil and honey, then toss until evenly coated.
Spread the mixture evenly on a baking tray.
Bake in the preheated oven for 15–20 minutes.
Stir once halfway through baking.
After cooling, mix in raisins or other dried fruits.