Fry ground beef until nice and brown. Remove from heat and store covered in fridge. This can be done the night before if sealed well. There's probably great debate on the time limit between stove and fridge, but I do let it cool a bit first to avoid condensation buildup in the container. Chop lettuce into bite size pieces, rinse and dry off. Drain chick peas. Right before serving mix all ingredients, including ground beef, together breaking the nachos into mixture and tossing with dressing. Serve immediately. The nachos lose their crunch quickly so get some while the gettin's good!