Mystery Veg

Shopping in a place like Laos offers all sorts of mysterious options. The vegetables below are new to me. If anyone has any idea what they are, please enlighten us. The rounded purple one tastes bitter and is a little astringent, and is one of the ingredients in a tasty local dish in the Nong Khai provinceof Thailand. Spicy sausage is grilled and cut up into pieces and wrapped up with vegetables in a thin rice wrapper inside of local leaves and then topped with a sweet barbecue-like sauce. MMMM, 7 weeks to go before I am off to Thailand again.