Summertime Zuke Soup

Name: Summertime Zuke Soup
Ingredients: 1 tablespoon extra virgin olive oil; 1 medium-sized white onion, chopped; 1 1/2 pounds organic zucchini, trimed, thickly sliced and chopped; 1 organic carrot, grated; Kosher salt and ground white pepper; 3 cups homemade chicken stock; 2 tablespoons fresh lemon thyme leaves, roughly chopped ( any fresh thyme will do); 1 cup half-and-half; 1/2 cup cultured sour cream (I used wallaby from Whole Foods); 1 teaspoon Meyer lemon zest (any fresh lemon zest)