Turkey Shepherd's Pie

Ingredients

• 3 tablespoons cold-pressed extra-virgin olive oil
• 1 large head cauliflower (3 pounds), cored and cut into ½-inch pieces
• ½ cup plus 2 tablespoons water
• Salt
• pepper
• 1 large organic egg, lightly beaten
• 3 tablespoons minced fresh chives
• 1 pound organic 93 percent lean ground turkey
• ¼ teaspoon baking soda
• 8 ounces cremini mushrooms
• 1 onion, chopped
• 1 tablespoon tomato paste
• 2 garlic cloves, minced
• ¾ cup homemade or low-sodium chicken broth
• 2 carrots, peeled and chopped
• 2 sprigs fresh thyme
• 1 tablespoon Worcestershire sauce
• 1 tablespoon cornstarch