2 tablespoons fresh lime juice
2 cups stemmed and chopped collard greens or spinach
1 1/2 cups frozen mango (or strawberries or apple)
1 cup green grapes
Combine the lime juice, ½ cup water, the collard greens, mango, and grapes in a blender and puree until smooth, about 1 minute, adding more water to reach the desired consistency.