Preheat an oven to 200 degrees F.
Using a vegetable peeler, remove strips of lemon peel. Be careful not to bring too much pith with the peel - you want a thin layer of bright yellow skin.
Line a baking sheet with parchment paper and lay the peels out on the sheet. Do not overlap the peels, they should not touch each other.
Bake for 30 to 35 minutes, until the sides begin to curl up.
Remove peels from the oven and allow them to cool for 2 to 3 minutes before blitzing them in a food processor or blender for 30 seconds to 1 minute.*
Combine the dried lemon pieces, black pepper, granulated onions, sea salt, and granulated garlic in a bowl and stir to combine.
Use immediately or store in sealed container a cool, dry place for up to 3 months.