Fonda Margarita is a breakfast restaurant that gives Mexico City, Mexico a clear reason to appear on a dining shortlist. The draw is the kitchen's clarity, hospitality and consistency; at a casual value price point, it should be judged as a practical, value-minded stop with more character than a default booking. It is most compelling for diners seeking a meal with a clear identity, not just a convenient table, especially if the night calls for something more considered than a safe default.