In a large skillet, cook the hamburger until no pink remains. Drain if needed. Add the taco seasoning and ½ cups of water. Simmer until the water is gone, then set aside.
Add the chopped lettuce, the cheddar and Monterey cheese cubes, tomatoes, and drained black olives to a large bowl or a platter.
Drizzle the Western dressing over it all and stir until combined.
When ready to serve, add the crushed Doritos and stir. Reserve some crushed chips for garnish.
Notes
Storage: Keep leftovers in the refrigerator and eat as soon as possible. The chips will get soggy. Adding additional crunchy chips before eating leftovers will help. Serving Tips: Keep ingredients separate until just before serving. Then combine and stir. Low FODMAP Notes:Low FODMAP ingredient information is based on the Monash University Food App and FODMAP Friendly App testing results.