I love aguas frescas, and I'm partial to the cantaloupe, but peach sounds delicious... this recipe came up on a google search:
http://www.wildoats.com/u/recipedetail11647/Peach Agua Fresca (Agua de Melocotón)
Cool and refreshing, agua frescas are popular south of the border and offer delicious thirst-quenching fruity flavor. See below for more flavors to try. Adjust sweetener to your taste and ripeness of the fruit.
Total Time: 5 minutes
Serves: 4
1 (10 oz.) bag Wild Oats Organic Peaches, thawed
4 c. very cold filtered water
1 tbsp. agave nectar or 2 tbsp. raw cane sugar
juice of one lime
Place ingredients in a blender. Pulse until smooth. Pour through a fine mesh sieve, reserving the liquid and discarding the pulp. Serve over crushed ice garnished with fresh mint.
Agua de Fresa: Three cups strawberries, hulled.
Agua de Papaya: Three cups papaya, peeled, seeded and diced.
Agua de Melón: One cantaloupe, peeled and seeded.
Agua de Sandía: One six pound watermelon, peeled and seeded
Agua Fresca de Pepino: Three peeled and seeded cucumbers, the juice of two limes and less sweetener.