There is no one-size-fits-all answer to this question, as the ingredients and method for making basic red sauce can vary depending on the chef. However, some common ingredients in basic red sauce recipes include tomatoes, onions, garlic, olive oil, and salt.
Cover chiles with warm water.
Let stand until softened, about 30 minutes;drain.
Strain liquid; reserve.
Remove stems, seeds and membranes fromchilies.
Cook and stir onion and garlic in oil in a 2-quart saucepan untilonion is tender.
Stir in chilies, 2 cups of the reserved liquid and theremaining ingredients.
Heat ot boiling, reduce heat.
Simmer, uncovered,20 minutes; cool.
Pour into a food processor workbowl fitted with steelblade or into a blender container; cover and process until smooth.
Coverand refrigerate up to 10 days.
Makes about 2 1/2 cups sauce.