Step 1: In a pan brown ground beef along with yellow onions. Add in one package of taco seasoning mix and water as directed on the seasoning package. Set aside.
Step 2: In a large bowl mix together tomatoes, lettuce, avocados, cheddar cheese, red onion, olives, and the other package of taco seasoning mix. Add beef mixture and toss until well combined.
Step 3: Right before serving – Toss with Catalina salad dressing and add chips.