In a stewpot, saute onion, garlic, chilies in the oil for 5 minutes. Add cinnamon, cloves, potatoes & cook for another 5 minutes, covered. Stir in tomatoes, green beans & cover & cook for 5 minutes more. Add the zucchini & corn. Simmer, covered on low heat till the vegetables are tender. If the stew seems too dry, add some tomato juice or water. Add cilantro & salt to taste. Serve with cornbread.