Risotto with carrot

4 cups vegetable stock 1 each onion chopped 4 cloves garlic chopped 1 1/4 cups arborio rice 2 each carrots chopped 2 each celery stalks chopped 5 ounces[...]

4 tablespoons unsalted butter 2 tablespoons olive oil 1 medium leek , rinsed well, dried, cut into 1/4-inch dice (white part only) 4 cups chicken broth ,[...]