Preheat oven to 325°F. Line two large, rimmed baking sheets with parchment paper. Add oats, salt, and brown sugar to a large bowl. In a food processor or blender, process one cup of almonds until very finely chopped. Pour mixture into bowl with the oats. Coarsely chop other half of almonds and add them to the bowl. Toss until mixed evenly.

Combine honey and coconut oil in a small saucepan and heat over medium-low just until coconut oil is melted. Add vanilla and whisk to combine. Pour honey mixture over dry ingredients and toss until evenly mixed. Pour granola evenly on two large, rimmed baking sheets and spread into an even layer.

Bake 15-25 minutes, tossing once or twice. Watch carefully so it doesn't burn. It should smell fragrant and be lightly golden. The exact baking time will depend on how crunchy you like your granola. Remove from  oven and cool on the baking sheets before breaking up into pieces and storing in an airtight container.