Preheat the oven to 300 degrees. Line two large baking sheets with parchment paper.
In a medium-sized bowl, mix together the oats, walnuts and salt.
In a separate small bowl, whisk together the melted oil, syrup, vanilla, lemon oil, lemon zest and egg white. Pour the wet mixture into the bowl with the dry ingredients and stir to combine, coating all dry ingredients and thoroughly as possible.
Spread the granola mixture out in an even layer, dividing it equally between the two baking sheets. Bake at 300 degrees, gently stirring every 15 minutes, until the granola is golden-brown and dry, about 40 minutes.
Remove the hot granola from the oven and immediately transfer it to a large bowl. Stir in the chopped apricots while the granola is still hot. Let the whole thing cool completely before eating. (Note: Store granola in a sealed container in your refrigerator or freezer for up to a week.)
Store in an airtight container in the freezer for up to a month.