Turkey Burgers with Grated Zucchini and Carrot

3/4 pound ground turkey 1 medium zucchini, grated 1 medium carrot, grated 2 cloves garlic, finely chopped 3/4 teaspoon dried thyme 3/4 teaspoon kosher salt 1/4 teaspoon black pepper 1 large egg 3 tablespoons olive oil 4 slices crusty bread 4 small leaves Boston lettuce 4 tablespoons mayonnaise (optional) 2 teaspoons fresh lemon juice (optional)

Heat broiler. In a large bowl, combine the turkey, zucchini, carrot, garlic, thyme, salt, pepper, and egg. Form the mixture into 4 patties. Heat 1 tablespoon of the oil in a large skillet over medium heat. Cook the patties, turning once, until no trace of pink remains, 4 to 5 minutes per side. Meanwhile, place the bread on a baking sheet and brush with the remaining oil. Broil until golden brown and crisp, about 1 1/2 minutes. Transfer the bread to individual plates. Top with the lettuce leaves and burgers. If using, combine the mayonnaise and lemon juice in a small bowl and serve with the burgers. Upgrade: For extra zest, rub the bread with the cut side of a peeled, halved garlic clove immediately after removing the bread from the oven. Yield: Makes 4 servings From Real Simple