Spinach Smoothies - great for St Patrick's Day

This is my sister's recipe for spinach smoothies. You can really just add spinach to any smoothie recipe and it adds lots of vitamins without changing the flavor.

fresh spinach leaves
orange juice*
1/2 C frozen pineapple tidbits
2 frozen bananas
1/2 C plain yogurt
ice cubes

Fill blender with spinach leaves to the top, then mash down. Pour the orange juice to spinach level. Add pineapple and bananas, then add yogurt. Blend until smooth. Add ice cubes if it needs thickening. (*You can use other fruit juices).