Prepare oatmeal, almonds, walnuts, and other nuts.
In a bowl, mix oatmeal, nuts, green tea powder, and salt well.
Add olive oil, honey, and vanilla extract and mix thoroughly.
Spread the mixture thinly on a baking pan lined with parchment paper.
Bake in the oven at 170°C (338°F) for 20 minutes, stirring once halfway through.
After it cools, break it into your desired size.