1Heat oven to 200ºF. In small bowl, place 1 cup of the salt. Mix lemon peel and juice; pour over salt and toss to coat. Spread salt on ungreased cookie sheet. Bake 1 hour.
2Meanwhile, in second small bowl, toss 1 cup salt with the rosemary until well blended.
3Cut vanilla beans in half lengthwise; scrape out seeds. Discard beans. In third small bowl, place remaining 1 cup salt; add vanilla seeds, rubbing seeds and salt together between fingers so no clumps of seeds remain.
4Store each flavored salt separately in tightly sealed container at room temperature.