In the Southwest, horchata is sold in convenience stores right alongside Coca-a-Cola. It’s sold in strip malls, Mexican taquerias and even makes a regular appearance at simple family gatherings. But I must admit, growing up in the Northeast, I was too long sheltered from the taste of this sweet, cinnamon-laden Mexican rice milk. I now order the creamy, cinnamon bespeckled beverage every chance I get, and rarely have I had a Northern friend in my presence who has tried it before. I encourage them to take a taste, and they are instantly hooked. Here’s my recipe for homemade horchata because sometimes in the Northeast, it’s just too long before you can find the good stuff. Double (or triple!) the recipe, and serve this up at your Cinco de Mayo feast for a taste of authenticity. Horchata Serves 6 Ingredients 1 1/3 cup uncooked long-grain white rice 2 cinnamon sticks 4 cups water, divided evenly in 2 2 cups milk (I…