Easy Taco Salad

I have become addicted to this one, its so quick and easy and tastes great. Mostly healthy too, has a little salt, but you can always go skimpy if you want.
Here's what you need:
1 Tbsp olive oil
1 lb lean ground turkey
1/2 an onion, chopped
1 avocado, sliced
1 handfull of cherry tomatoes, halved
2 or 3 heads romaine lettuce, sliced
1 packet low sodium taco seasoning

What to do:
Add olive oil to skillet and heat to medium high
Add onion and heat till they are just starting to get some color on them, four or five minutes
Add turkey and cook until done
While turkey is cooking,clean and chop the tomatoes, avocado, and lettuce
When turkey is done, add taco seasoning and water and bring to a boil
Once boiling, turn heat to low and give sauce a few minutes to thicken
Toss lettuce with tomatoes, top with turkey, garnish with avocado and maybe a little hot taco sauce