Guacamole is prepared differently in various regions of Mexico. In the city of Monterrey, it is garnished to reflect the colors of the Mexican flag. For the guacamole: totopos (crisply fried tortilla wedges) Put avocadoes in a glass bowl, and mash them with a fork. Add onion, cilantro, lime juice, zucchini, oil, chiles, and salt. Mix the ingredients thoroughly to form a puree. Put the avocado pits in the guacamole to prevent darkening. To serve, spoon guacamole into a mortar, and decorate with tomato on one side and green onions, chiles, and cilantro leaves in the center. On the other side, place the totopos. Makes 8 servings.