1. Get the Three Brothers Mexican Grille Online Order app and conveniently order from anywhere on your Android phone and tablet. 2. Three Brothers Mexican Grille is going digital now and has it's own online ordering app. If you want to order delicious food from us, just download our app and place order in 3 quick steps. Build your order just the way you like it or choose one of our combo from the menu. Add items from the rest of our robust menu. And with the order Tracker ® you can follow you