Quick & Easy Avocado Feta Salad

I've been on an avocado kick lately, so I threw this salad together. It's pretty simple. I made a bed of Romaine lettuce in a medium salad bowl, cut up an avocado, and half a medium sized tomato. I put that in the bowl along with 3 slices of white onion, cut into quarters. I sprinkled in some chunks of feta cheese, maybe 1/3 cup (?). Then I drizzled it with lime juice & olive oil. It tasted good to me...