Toona Sinensis is a cold-hardy variety of mahogany with edible foliage.
Toona Sinensis is often called "The Garlic & Onions Tree" because of its aroma and flavor. In addition to the allium-like spice, the leaves also have an umami aspect that people say tastes meat or mushrooms. The leaf shoots are a highly regarded food in asian cuisine, such that mahogany leaves are the new avocado in China.
Toona Sinensis wood is graded as "true mahogany", which is quite valuable and in short supply.
More info on this unique tree can be found at PFAF: https://pfaf.org/user/Plant.aspx?LatinName=Toona+sinensis
Sold bare-root, 1 to 3 feet tall.
Photo Credit: I, Doronenko, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons