Rubbing ripe tomatoes over garlic toast may seem strange. But it's a tradition in Spain, where it's common to find a plate of tomatoes and garlic on the table, waiting for the toast to arrive. The crisp toast almost melts the garlic and the tomatoes, which complement the crunchy kosher salt. Very ripe tomatoes and a hearty, dense bread work best. If firing up the grill to toast the bread seems daunting, you can broil or bake it in the oven.