This recipe is for a big crowd. I usually half the ingredients for my family.
Feeding twenty people requires careful management of grocery expenses, making bulk-prepared ground meat an economical base. Brown the beef thoroughly and drain the rendered fat through a fine-mesh metal colander to prevent excess oil from diluting the dressing later. When substituting condiments, note that sour cream can replace mayonnaise at a one-to-one ratio, though it yields a tangier finish with less heavy fat content. Packaged taco seasonings contain high amounts of sodium, so taste the meat mixture before adding extra salt to the dressing. For the dressing base, whisk mayonnaise, ketchup, and milk until smooth before folding in the picante sauce. Chop the lettuce into uniform one-inch ribbons to ensure every bite holds an equal distribution of toppings. Shredded Mexican cheese blends typically combine cheddar, Monterey Jack, and Asadero; grating these blocks manually provides superior melting characteristics compared to pre-bagged varieties coated in cellulose. Toss the chopped lettuce, cooled meat, sliced olives, and cheese together up to two hours in advance, but keep the bowl refrigerated at or below 40 degrees Fahrenheit. Introduce broken tortilla chips only within five minutes of serving to maintain a crisp texture against the moisture of the salad. Storing dressed leftovers beyond four hours causes the chips to turn soggy and degrades the crunch of the lettuce.