Combine all of the chopped herbs in the bowl of a food processor (I use my mini food processor). Add ¼ cup of the fine sea salt. Pulse until everything is finely chopped and the consistency is like slightly damp sand.
Add the garlic cloves and pulse again until the garlic is invisible and well incorporated. The texture at this point will be more like wet sand.
Combine the remaining fine sea salt and the herb mixture on the 12x18-inch sheet pan. Be sure to scrape out all the good herb stuff from the sides and bottom of the food processor bowl. Add the pepper and, using your hands, mix until well combined. It should be a pretty green color at this point.
Place in the preheated oven for 30 minutes. Turn off the oven, allowing the mixture to cool and continue to dry out for another 30-60 minutes. Remove from the oven and allow to cool completely.
Rub the mixture with your hands to break up any lumps. Any smaller lumps can be crushed with the back of a spoon. Transfer to airtight storage jars when completely cooled. Sprinkle it on everything (well, maybe not ice cream or brownies!).
See Café Tips above in the post for more detailed instructions and tips to ensure success.
The herbs do not need to be chopped super fine before adding the food processor. The processor will do that. But you do want to chop them up a bit so you can properly measure them. Also, I've found that whole herb leaves can get stuff in the blades of the food processor.