Classic Green Chile Sauce Recipe

this Can Be Used In Any Recipe Needing A Green Chile Sauce.

8 Chopped Green New Mexican Chiles, Roasted,
    Peeled, Stems And Seeds Removed (optional)
1 Medium Onion, Chopped
2 Cloves Garlic, Chopped
2 Tablespoons Vegetable Oil
1 Medium Tomato, Peeled And Chopped
1/2 Teaspoon Ground Cumin (optional)
2 Cups Water

sauté Onion And Garlic In Oil Until Softened. Add Remaining Ingredients, Bring To A Boil, Reduce Heat, And Simmer For 30 Minutes.