There is a Costa Rican restaurant called Irazu, on Milwaukee in Chicago that has this Oatmeal shake that I have been trying to figure out for awhile now. Does anyone know how to make this amazing shake?? It seems like it would only be a few simple ingredients like: cooked oatmeal, vanilla, soy milk, sugar (possibly agave nectar), cinnamon and ice. But that's not working, and neither are any of my other guesses. Here's a couple photos of my favorite things there. The garlic Yuca which is so full of flavor and crispy, like a french fried potato.
(click on "Irazu" for the menu").