3Place over high heat, bring to a boil, then turn the heat to low. Skim the broth. Add: 1 carrot, peeled, 1 onion, peeled and halved, 1 head of garlic, cut in half, celery stalk, Salt, 1/2 teaspoon black peppercorns, 1 bouquet garni of parsley and thyme sprigs and a large bay leaf.