Green Chile Sauce 1 onion, chopped 3 to 5 cloves fresh garlic 8 to 10 finely chopped green chiles (stems and seeds removed) 1 tomato, peeled and chopped Sauté onion and garlic in oil until softened. Add chile, tomato, and about two cups of water. Simmer for 30 minutes. Use as a base for green enchiladas.