Yellow-red Mr. Stripey tomatoes give this ice a light hue. Use red or purple tomatoes if you want a darker granita, if you prefer. Mixing purple basil with deep-green Italian basil yields a nuanced flavor and a lovely garnish.
I like to brush the interior of this sandwich with a mojo, a flavorful garlic-lime mixture. Because it’s not easy to find Cuban bread in my area, I use sub or bulky rolls, which acquire a crusty texture when pressed during cooking. If you have a panini grill, you can use it instead of pan-cooking the sandwiches.