If I ever find a "Pineapple Guava". Pineapple guava, also called feijoa, is a fruit that adds a sweet-tart-floral flavor to foods like this quick bread. The glaze adds a bit of sweetness to each slice, but it's good without the glaze too.
The tart-floral flavor of pineapple guava (feijoa) pairs really well with sweet strawberries. Guava also makes for a pleasingly thick smoothie. Feel free to add other favorite tropical fruits, like pineapple or banana.