Sweet Thai Basil (bai horapah in Thai) has a distinct aroma and tastes rather like anise, a taste different from the European sweet basil, and is used in red and green curries, stir-fries and eaten on the side raw as a vegetable (especially with Thai Beef Noodle Soup) with bean sprouts and lime.
Store basil wrapped in a paper towel inside a ziplock bag. Use it soon after buying, because this herb is highly perishable and does not dry or freeze very well.
