Chop all of your veggies that you want to add to your salad and put them to the side.
Add the white onion and lean ground turkey meat to a pan. Add olive oil and cook until browned then add the taco seasoning and water. Put the seasoned turkey and onion mix to the side
Use a large bowl to add the bags of lettuce. Add all of your chopped veggies to the bowl. Add Catalina dressing to your taste and mix.
Get out bowls and add your lettuce/veggie mix to each. Add a scoop of the turkey and onion mixture to each. Top each bowl with whatever toppings you choose (Tortilla Chips, avocado, mexican cheese, tajin, etc) and enjoy!