Brown the ground beef until no pink remains.
Drain any fat.
Stir in the taco seasoning packet and water.
Simmer until thickened, about 5 minutes.
Set aside to cool.
In a large bowl, combine the lettuce, peppers, black olives, pinto beans, tomatoes, cheddar and green onions.
Top with the seasoned and cooled ground beef.
Slightly crush the Doritos and sprinkle on top.
Drizzle with catalina dressing and toss to coat evenly.
Garnish with sour cream and additional green onions is desired.
Toss just before serving to avoid the Doritos from becoming soggy.