Preheat the oven to 300°F / 150°C and line a rimmed baking sheet with parchment paper.
Whisk ⅓ cup of vegetable oil, ¼ cup of maple syrup, ¼ cup of packed light brown sugar, 1 large egg white, ¾ teaspoon of vanilla extract, 1 teaspoon of ground cinnamon, and ¾ teaspoon of salt.
Fold in 3 cups of old-fashioned rolled oats and 1¼ cups of chopped nuts. Press into an even layer on the baking sheet.
Bake for 15 minutes. Stir, press back into an even layer, and bake for 15-20 minutes more, until golden. Cool completely on the pan, then break into clusters.
