Agua de Tuna (Prickly Pear Drink) for Weight Loss

1. Peel the skin off the tunas (prickly pear fruit).
2. Add the peeled tunas to a blender with 1 cup of water, the juice of the lemons or limes, and 1/2 to 1 cup of sweetener to taste.
3. Once blended, strain the mixture into a pitcher.
4. Add 3-4 additional cups of water depending on how thin you like the consistency. (Adding 3 cups yields about 6 cups of agua fresca).
5. Chop the remaining tuna (the one saved for garnish) and add it to the water in the pitcher. Mix well.
6. Add ice to a glass and pour your agua fresca to serve.