Place 1 (15-ounce) can tomato sauce, 1 (4-ounce) can green chilies with the liquid, 1 tablespoon chili powder, ½ teaspoon cumin, ½ teaspoon dried oregano, and 1 teaspoon minced garlic in a food processor or blender.
Blend until the mixture is smooth.
Pour the sauce into a saucepan and heat over medium-high heat until warmed through.
Gradually stir in ? cup water until the sauce reaches your desired consistency.
Serve immediately or use in your favorite recipe.
Notes
This sauce is easy to make ahead of time. If you make it ahead of time, refrigerator in an air tight container for up to 5 days or you can freeze it for up to 3 months.