Add 1 1/2 tablespoons oil to a skillet and heat it over medium heat
Add the onions and cook them for about 15 minutes -- try not to stir them
Once the onions start to brown, add 1 1/2 tablespoons of butter, reduce heat and allow them to cook over medium to low heat for about 20 to 30 minutes more, stirring periodically so that they don't stick to the pan.
The onions are caramelized once they turn dark in color
Remove the caramelized onions from heat and set them aside to cool
Once onions are cooled stir them into 1 cup of Greek yogurt along with the soyi sauce, thyme and lemon juice.
Notes
Refrigerate at least one hour before serving.Serve Greek yogurt onion dip with chips, crackers or fresh vegetables.Store leftover onion dip in the refrigerator for up to a week in an airtight food storage container.See article above for recipe tips,variations, substitutions and more!