First, to make the vinaigrette, whisk together olive oil, balsamic vinegar, garlic and sugar in a small bowl; then set it aside.
Next, you will want to assemble your salad, by placing the spinach in a large bowl. Then you will want to top it with the strawberries, avocado, quinoa, pecans, and goat cheese. Pour dressing on top of the salad and gently toss to combine all of the ingredients. After you have tossed well, you are al ready to serve!