Smoked salmon salad with Grapefruit

Today I wanted something light for dinner and I came up with this. Honestly, this salad tastes great and it's so bright. 

1 cup of chopped romaine lettuce

1 stalk of celery, chopped

1 pink graipfruit, cut

1/4 red onion, cut

Smoked salmon (whatever amount works for you) 

Dressing - 

2 tsp balsamic vinegar

1tsp olive oil 

Salt, pepper 

Just put everything together and pour dressing on top. Enjoy!