Divide the ingredients into 3 equal parts. Place 1/3 of the peanuts, salt and honey into the food processor. Process for a minute. Scrape down the sides of the bowl. Drizzle in the oil and process until the mixture is smooth, for about half a minute. Place the peanut butter in a jar. Repeat with the remaining ingredients. Store in an airtight container in the refrigerator for up to 2 months.