Rutabaga Bisque

Ingredients

• 1/4 cup extra-virgin olive oil
• 4 cups rutabagas (, cut into one-inch cubes)
• 2 cups onions (, chopped)
• 1 cup carrots (, peeled and chopped)
• 1 cup celery (, chopped)
• 1/2 cup bourbon
• 6 cups chicken stock
• 16 ounces thick plain Greek yogurt (for a richer (, milder version, use)
• heavy whipped cream instead)