1 cup spinach
1/2 cup fresh or frozen blueberries
1/4 cup frozen melon cubes
1/2 to one cup of liquid- my standbys typically include rice milk or apple juice, both selected for their mild flavor. Use drinkable yogurt for a thicker consistency, but do note that if you add plain yogurt or rice milk, you may want to sweeten up your smoothie with some honey.