Lentil/Quinoa/Mixed Bean Salad

I have been wanting to do some sort of quinoa/lentil type salad for awhile now. As a vegetarian foods like this are great because it's so full of complete proteins. I completely made up this recipe myself. I basically just went with what I thought would go well together.
The quantities here are approximate as well. I basically just cooked, chopped, added, etc as much of each ingredient as I thought looked good.

Lentil/Quinoa/Mixed Bean Salad:

1 1/2 cups COOKED and COOLED quinoa
1 1/2 cups COOKED and COOLED brown lentils
1 can of mixed beans

1/2 cup diced red onion
1/2 cup diced green onion
Fistful of sunflower seeds
Zest of 1 lemon

Toss everything together

Dressing:
1 part balsamic vinegar
3 parts olive oil
Juice of 1/2 lemon

Pour over salad and toss


This turned out really tasty. It's nice and light, without any flavours overpowering others. The only thing I might change is switching the red onion for green onion, for a milder flavour. Even though red onion is mild to begin with, I think I would have just preferred a little less of it. If I did this, I would probably use red pepper instead of green, just to keep things colourful.