Are you trying to find a little something different in your fruit? Introducing the tamarillo, also known as the Tomate de Arbol or tree tomato! This fruit is tropical and related to tomatoes. Don't be fooled by that, though; the tamarillo is a distinct fruit with a tangy, tart flavor that's ideal for a little zing in your lunch or breakfast. The Tree Tomato, which is grown at high elevations, has a flavor that people liken to a blend of passion fruit and guava, along with the tomato undertones that give it its name.