Quinoa Tomato Salad

"I had this in the bistro part of an organic food store in Colonia many years ago, and it was so good and simple that I've made it over and over again since then. In place of the large chopped tomatoes you can use halved cocktail tomatoes, too. You'll notice that I don't tell you to rinse the quinoa before cooking to remove bitter taste. I've done that for years until I once forgot to do it and realized that it didn't taste bitter at all. Since then I've never again rinsed the quinoa before cooking, and it never tasted bitter. Not sure if it's just the quinoa we get here, so feel free to rinse your quinoa anyway, it sure won't hurt - I'm just being lazy :) Cooling time is not included in cooking time!..."