Smash the garlic clove, sprinkle with 1 teaspoon of the salt, and, with the flat side of a large knife, mash and smear the mixture to a coarse paste. Mix the garlic, tomatoes, onion, jalapeno, and coriander in a serving bowl. Add the tequila, if desired, and season with the remaining salt, adding more to taste if necessary.
Serve immediately or cover with cling film and set aside for one hour at room temperature. Serve with the tortilla chips.