Daikon radish seeds. These end up looking like gigantic white carrots and taste much milder than your typical radish. If you have dim sum this weekend, you might want to try the delicious savory radish cakes.
Chinese long bean seeds - these plants grow on vines. The beans grow by twos and reach ridiculous lengths - they're also known as yard-long beans. They should be picked young and tender though. They are tremendous stir fried!