Frozen banana: Frozen banana adds a creamy texture to smoothies and as feijoa flesh has a grainy mouthfeel using a frozen banana makes this smoothie taste its best.
Acid: Adding a little acid in the form of lemon or lime juice will really enhance the flavour of this smoothie.
Spinach leaves: You can use any green leafy vegetables such as kale. You can also use frozen spinach.
Banana: This smoothie is best if you use a frozen banana.
lemon Juice: This can be substituted for lime juice
Water: If you want a sweeter smoothie this can be substituted for apple juice.