Add butter, sugar, and walnuts to a saucepan and melt the butter. Continue to stir on low heat and cook until caramelized.
Remove the walnuts, separate and place on parchment paper to cool. Set aside.
Place oil, vinegar, Greek yogurt, and Dijon mustard into the food processor. Blend well, then add salt and pepper to taste and blend once more. Set aside.
In a salad bowl, tear spinach into pieces and place it in the bowl.
Add onions, bacon, and crumble goat cheese into the spinach.
Break up any walnuts that stuck together and sprinkle them over the salad.
Dress salad with the Creamy Balsamic Dressing to your preference and toss together. ENJOY!