Sweet Spinach Smoothie

This recipe comes from fitnessmagazine.com. 

I like this smoothie but it's a little thick. I add apple juice and a couple cubes of ice to thin out the mix. 

6 ounces plain nonfat Greek yogurt
2 cups spinach leaves, packed
1 ripe pear, peeled, cored, and chopped
15 green or red grapes
2 tablespoons chopped avocado
1 to 2 tablespoons freshly squeezed lime juice

Mix together in a food processor or blender.