1/2 apple (use a tart variety like Gala), cored but not peeled, roughly chopped
1/2 cup frozen blueberries
1/2 cup unsweetened apple juice
1/2 cup plain low-fat yogurt
1/2 tsp agave nectar, or more to taste
3 large basil leaves
5 ice cubes
Place all ingredients except the ice into a blender, and process until almost smooth. Add the ice, and continue processing until completely smooth.