The Buddha’s Hand, or fingered citron (no jokes please) is a popular and fragrant citrus fruit commonly consumed in Asia. If you can get through the thick peel you will find a tiny amount of seedless, rather dry flesh that is reminiscent of a lemon
10 Deliciously Exotic Plants, Fruits and Vegetables
Romanesco Broccoli - Brassica oleracea - Its form looking strikingly fractal in nature, it is also known as the Romanesque cauliflower and is an edible flower bud. Compared to a traditional cauliflower as a vegetable, its texture is far more crunchy and its flavor is not as assertive, being delicate and nutty
Guanabana The guanabana, or soursop, is native to Central and South America but is currently grown in Asia. Large inedible seeds make its white pulp difficult to eat. It's worth eating if you like pineapples or strawberries, though, because the guanabana's flavor has been compared to those two fruits.
Feijoas.These small green fruits are reminiscent of kiwis. They are egg-shaped, and the inner flesh can be scooped out and eaten along with the pulp and seeds. The texture is similar to a pear while the flavor is slightly citrusy and sweet. Feijoas are best enjoyed when soft and ripe. - Delish.com
This veggie isn't the most attractive of tubers, but when peeled it is crunchy and mild. It can be used in place of potatoes or water chestnuts and is commonly used in Mexican cooking, but has spread to Asia as well.
"MANGOSTEEN"....This mango relative was once illegal in the U.S. due to a specific breed of fruit fly that is associated with it. Once the ban was lifted, mangosteen prices skyrocketed at specialty stores. But now the fruit, while still a somewhat rare find is available in the U.S.. The dark purple fruit is extremely sweet once the outer layer is peeled away. To peel, simply score the outer part of the fruit and then break the rind into two pieces, revealing the sweet, edible interior.