Homemade Horchata

Bahan-bahan (4 porsi)

• ⅔ cup long grain brown* or white rice (dry/uncooked)
• 1 ¼ cup blanched almonds**
• 3 -inch piece of cinnamon stick
• 4 ½ cups water, divided
• ⅓ to ½ cup light agave nectar, to taste